The weather and climate of Nineveh.

A hot semi-arid climate moderated by the Tigris and the northern foothills, sharply seasonal in rainfall, with mild wet winters and ferociously hot dry summers; a region now living through accelerating warming, recurring summer heat domes that have pushed temperatures past 50 °C, dust-storm seasons of 200-plus days, and the slow tightening of the water supply on which the wheat belt depends.

Nineveh's weather is one of the most consequential facts about the province. Where the wheat grows, where livestock can survive the summer, where the city of Mosul becomes physically dangerous in August, when the dust comes and from where, what the Tigris is doing this year and what it will do next year — these are questions answered by climate before they are answered by anything else. The climate of Nineveh in 2026 is the climate of upper Mesopotamia in a warming, drying world: still recognisably the climate that produced the Jazira wheat belt and the citrus gardens of the Christian villages and the date plantations along the Tigris, but stressed in ways that the historical pattern did not contain and that the next twenty-five years will significantly intensify.

This entry surveys what the climate is, how it varies through the year, what has changed in the recent record, and what the projections suggest. It draws on the Iraqi Meteorological Organization, the Iraqi Ministry of Environment, the World Meteorological Organization, the International Energy Agency's National Climate Resilience Assessment for Iraq (2024), the World Bank Climate Change Knowledge Portal, NASA Earth Observatory imagery, peer-reviewed studies in Theoretical and Applied Climatology and Weather, and the published meteorological records of European and American climate agencies. Note that for some specific local figures we use long-period averages from international sources where consistent Iraqi station data has been gappy.

i. Overview: a hot semi-arid climate at the rim of the desert

The climate of Nineveh, in the standard Köppen classification, is BSh (hot semi-arid) across most of the governorate, transitioning to BWh (hot desert) in the southern Jazira and in the southwest steppe near the Syrian and Anbar borders. The wider Iraqi climate framework, as the International Energy Agency describes in its 2024 National Climate Resilience Assessment for Iraq, divides the country into three zones: a warm desert climate that predominates in approximately 70% of the country's territory (mostly the western and southern regions, where temperatures can exceed 50 °C during the summer months); a Mediterranean climate in the mountainous northeast, characterised by cold winters with snowfall at higher altitudes and mild summers with temperatures generally not exceeding 35 °C; and between these two, a transitional semi-arid steppe climate. Nineveh sits at the boundary between the desert and steppe zones, with its northeastern districts (Akre, Shaikhan) extending into Mediterranean-influenced foothills and its southern districts (Hatra, Baaj) into the warm desert.

The principal climatic facts about Mosul, the provincial capital, are these. Mean January daytime maximum sits at approximately 12 °C, with night minimums near 4 °C and occasional frost; mean July daytime maximum sits at approximately 43 °C, with night minimums near 25 °C. The annual cycle is sharper than this implies, with summer extremes regularly reaching 47–48 °C in heatwave years and winter minima occasionally falling several degrees below freezing. Annual precipitation in Mosul averages approximately 355 mm, concentrated almost entirely between November and April, with the months of June, July, August and September typically receiving essentially no rainfall.

The geography of the climate within Nineveh follows the geography of the province. The northeast, where the land rises into the foothills of the Zagros — Akre, Shaikhan, the eastern parts of Tilkaif and the Hamdaniya highlands — receives more rainfall, has cooler summers, and supports a richer agricultural mix including rain-fed orchards and vines. The centre and west, the Tigris valley and the Jazira plain proper, has the climate described above: enough rainfall in normal years for rain-fed wheat and barley, but with high inter-annual variability. The southern Jazira and the western steppe, the country south of Mosul toward Hatra and toward the Syrian and Anbar borders, transitions toward desert: less rainfall, hotter summers, more dust, and a transition from rain-fed cropping to seasonal grazing as the dominant land use.

The Tigris itself is the single most important physical moderator of the climate. The river runs north–south through the centre of the province, providing irrigation water, river-bank vegetation, evaporative cooling in summer, and the source of the urban water supply for Mosul and many of the smaller towns. The state of the Tigris in any given year — water level, sediment load, flow rate — is one of the principal determinants of the agricultural year and is the most important single indicator of the climatic and hydrological state of the province. The Mosul Dam, upstream from the city, regulates Tigris flow into Nineveh and plays a critical role in both flood control and drought buffering (Geography, § v).

ii. Temperature and the annual cycle

The annual temperature cycle in Mosul moves between two regimes. The cool wet season — November through April — has daytime maxima ranging from approximately 12 °C in January, the coldest month, through 25 °C in April; night minima range from approximately 4 °C in January to 14 °C in April. January night temperatures occasionally drop below freezing, and snow is recorded in the city perhaps once every several years. Britannica gives the historical Mosul January temperature range as between −4 °C and 17 °C (24–63 °F), with readings as low as −11 °C (12 °F) having been recorded. The transitional shoulder months — April, May and October — are pleasant in their middle parts but turn hot quickly: by mid-May the daytime maxima are routinely above 32 °C, and by mid-October they are still in the high 20s or low 30s.

The hot dry season — May through October — is the climatically dominant period. June, July and August are the three hottest months, with mean daytime maxima above 38 °C and frequently exceeding 43 °C in any given week. The relative humidity in summer is, fortunately, low — typically 20–30% — which makes the heat dry rather than the more lethal moist heat of the Persian Gulf coast, but the absolute air temperatures are nonetheless among the highest sustained values recorded anywhere on the inhabited Earth. The hottest extreme temperatures recorded in Mosul through the historical period have been in the 47–48 °C range; this ceiling has shifted upward in the 2020s as discussed in § iv below.

The diurnal temperature range is large, particularly in summer, when night-time temperatures fall from daytime peaks of 43 °C or higher to night-time lows of 25 °C or so — an 18-degree swing that provides limited overnight relief but is significant for human, livestock and crop physiology. In winter the diurnal range is smaller, with daytime maxima of 12 °C falling to night-time minima of 4 °C — an 8-degree swing.

The trend in temperature over the past several decades has been upward, consistent with the wider Iraqi and Middle Eastern pattern. The IEA National Climate Resilience Assessment for Iraq (2024) places Iraq's climate-hazard level for temperature trend as "high", with the slope of linear regression of national temperatures above 0.048 °C per year — that is, more than 0.011 °C per year above the world average. Iraq is among the most climate-vulnerable countries in the world. The Iraqi national average temperature for 2000–2023, sourced from the IEA Weather for Energy Tracker, reflects this rising trend.

iii. Precipitation and the seasonality of water

The precipitation regime is sharply seasonal. The cool wet season — November to April — provides essentially all of the annual rainfall. Mosul averages approximately 355 mm annually, with the heaviest months being January (approximately 69 mm), February (74 mm), and March (80 mm), tapering through April (68 mm) and substantially less in November (40 mm) and December (60 mm). May receives approximately 28 mm, October about 14 mm, and the four months from June through September together receive essentially nothing — typically less than 5 mm of rainfall combined across the entire summer. Worlddata recorded that the Mosul weather station's 7.3 mm-per-day reading was the highest monthly average of the last 76 years for Iraq, indicating both the variability of the system and the importance of Mosul's position as one of Iraq's wetter places.

Within Nineveh, rainfall declines from north to south. The northeastern districts — Akre, Shaikhan, parts of Tilkaif — receive approximately 400–500 mm annually, with snowfall on the higher elevations in winter. The central Tigris valley and northern Jazira (where Mosul itself sits) average around 300–400 mm. The southern Jazira and western steppe — the country approaching Hatra and Baaj — receive less than 200 mm and shade into the arid zone where rain-fed agriculture is no longer reliable and seasonal grazing becomes the dominant land use. The result is that Mosul itself receives almost twice the annual rainfall of Baghdad and approximately five to ten times what the southern desert provinces receive — a key reason the Mosul region has been a major agricultural and trading centre for several millennia.

The inter-annual variability is significant. Long-period averages obscure the fact that any individual year in Mosul can receive substantially more or substantially less than the mean. The recent record shows several drought years — most notably 2020–2021, 2022 and 2023 — when annual totals fell to two-thirds or less of the long-period average; these were also years in which the wheat harvest was substantially below the previous trend, before recovering with the better-rainfall years of 2024 and 2025. The seasonal distribution can also shift, with some years showing late-onset (November rain only beginning in mid-November rather than early November) or early-cessation (April rain ending in mid-April rather than late April) patterns that affect the agricultural year.

iv. Heat domes and the summers of the 2020s

The defining climatic feature of the Nineveh climate in the 2020s has been the increasing frequency and intensity of summer heat domes — meteorological situations in which a high-pressure system locks over a region and traps superheated air at the surface, producing prolonged extreme temperatures across the Middle East. The wider 2025 Iraqi heatwave was particularly severe. The Upper Euphrates Center for Sustainable Development Research at the University of Anbar reported on 14 July 2025 that the data from 8,600 global meteorological stations placed Iraq, Iran and Kuwait among the world's hottest locations that day, with most station readings ranging between 50.7 °C and 48.2 °C — all within ranges considered "dangerous" to public health, particularly with direct exposure. Major cities including Baghdad and Mosul recorded temperatures close to the upper limit, indicating that the heatwave extended from desert areas into urban centres, a phenomenon attributed in part to urban-planning shortcomings, lack of afforestation, and neglect of green areas.

The peer-reviewed climate literature has documented this intensification. A 2025 article in Theoretical and Applied Climatology proposes a new metric — "average extreme heat intensity" — for tracking climate-change signals in arid environments, with Iraqi cities including Mosul as principal study sites. Related work in Environmental Protection and Natural Resources (Al-Jiboori and Deagan, 2025) examined cloud liquid water content profiles over Mosul, building the atmospheric-science context for the region's heat trends. The convergence of multiple lines of evidence points the same direction: Iraq is warming faster than the world average, summer heat extremes are intensifying both in their peaks and in their duration, and the 50-degree threshold — once an occasional anomaly — has become a regular feature of any given summer's record.

Mortality and infrastructure effects of the heat are significant. Iraqi hospitals see substantial spikes in heat-related admissions during heatwave periods, particularly affecting the elderly, the chronically ill, outdoor workers, and people without access to reliable cooling. The Iraqi electricity grid, which is already constrained, faces additional stress during heatwaves as cooling demand spikes; the Qayara Combined-Cycle Power Station expansion (Economy, § ii) and related grid upgrades are partly motivated by this load growth. The construction industry, agriculture, and any outdoor labour are reorganised during the hottest periods, with shifted work hours and partial shutdowns common.

v. Drought, water scarcity and the Tigris

Drought is structurally linked to Iraq's climate-change exposure and is one of the country's foremost climate concerns. The Planetary Security Initiative reports that water flow from the Tigris and Euphrates rivers has decreased by 30–40% over the past 40 years, and the World Bank projects another 20% decrease in overall water resources by 2050. This rapid decline, combined with extreme temperatures, has contributed to the desertification of over 50% of Iraq's previously arable lands, with as much as 71% of agricultural land in the once "Fertile Crescent" now threatened by desertification due to climate change and the loss of vegetation cover.

For Nineveh specifically, the Tigris is the principal hydrological lifeline, and the upstream Turkish dam system on the Tigris — most notably the Ilisu Dam, operational since 2018 — has materially reduced the volume of Tigris water reaching Iraq during low-rainfall years. The Iraqi federal government has been in long-running negotiations with Turkey over Tigris flow allocations; the Mosul Dam, immediately upstream from Mosul (Geography, § v), is the principal Iraqi-side storage and regulation point for the Tigris and provides both flood control in wet years and drought-buffering in dry years.

Groundwater depletion is a second major concern. Across the Jazira and the southern Nineveh districts, agricultural and household groundwater abstraction has increased substantially in recent decades, with falling water tables now constraining irrigation in areas that have shifted from surface-water to groundwater dependence. The combination of reduced surface flow and groundwater depletion is the principal climatic threat to Nineveh's rural economy.

The 2020–2021, 2022 and 2023 drought years were particularly significant. Wheat yields fell substantially during this period (Economy, § iii), with rain-fed agriculture in the Jazira producing well below long-term averages. The recovery in 2024 and 2025 — Iraq has achieved a marketed wheat surplus exceeding 5 million tons for the third consecutive year — has been important, but the underlying structural trend remains downward.

vi. Sand and dust storms

Sand and dust storms are an increasingly significant climatic hazard for Nineveh and for the wider Iraqi region. The Iraqi Ministry of Environment, reported by the Atlantic Council in 2022, found that dusty days in Iraq increased from 243 to 272 per year over the previous two decades, with projections suggesting they could reach approximately 300 days annually by 2050. The IEA's 2024 National Climate Resilience Assessment confirms this trend: in the first half of 2022, central Iraq experienced ten storm events lasting two to four days each, requiring medical attention for thousands of people. By 2022, Iraq experienced over 200 dusty days — more than double the annual average recorded in the 1980s and 1990s.

The 2025 dust storm season has been notably severe. In April 2025, a sweeping dust front across much of Iraq sent over 3,700 people to hospitals; flights were grounded in Basra and Najaf, and governmental operations halted in some areas due to zero visibility. By early May, more than 300 additional respiratory distress cases were reported in Diyala and Kirkuk's Hawija district. The 2025 season has been characterised by experts as starting early and arriving violently. The Iraq Green Observatory has projected that Iraq may experience over 100 days of dust and sand storms during the 2025 season due to the combination of drought, desertification, irregular rainfall and regional dust sources.

The source areas of dust affecting Nineveh include the Syrian Jazira (immediately to the west), the Iraqi western desert (Anbar), and increasingly the desiccated marshlands of southern Iraq. The seasonal pattern peaks in spring (March–May) and again in autumn (September–November), with the spring season generally more intense. The Tigris valley channels and intensifies dust events: Mosul itself, the Nineveh Plain villages, and the Sinjar region all receive substantial dust during major events.

The public-health impact is significant. The UN World Meteorological Organization in 2025 reported that sand and dust storms globally affect more than 330 million people in 150 countries, and contribute to premature deaths from respiratory and cardiovascular conditions. The UN General Assembly has designated 2025–2034 as the UN Decade on Combating Sand and Dust Storms. UN ESCWA estimates the economic cost in the Middle East and North Africa region at approximately $150 billion annually, or roughly 2.5% of regional GDP — a substantial fraction of which falls on Iraq.

vii. Climate change and the 2020s

Iraq is among the most climate-vulnerable countries in the world. The IEA National Climate Resilience Assessment (2024) places Iraq's temperature-trend hazard at "high" with a linear regression slope of more than 0.048 °C per year, well above the world average. The country's INFORM Risk Index rating for drought is in the "high" category (above 7 on a 0–10 scale), and the combined climate-hazard and exposure picture places Iraq in the world's most exposed group of countries.

The principal climate-change vectors for Nineveh, drawing on the World Bank Climate Change Knowledge Portal and the IPCC's regional assessments, are these. Temperature: warming is projected to continue, with annual mean temperatures in Iraqi cities expected to rise by approximately 1.5–2.0 °C above the 2000–2020 baseline by 2050 under intermediate emissions scenarios, and by 3.0 °C or more under high emissions scenarios. Precipitation: the projection is for stable-to-slightly-decreasing annual totals, but with substantially increased variability and a shift toward more rainfall concentrated in fewer events. Extremes: heat-wave intensity, drought duration and dust-storm frequency are all projected to increase. Water: river flows are projected to continue declining, both because of reduced precipitation in the catchments and because of upstream abstractions in Turkey, Iran and Syria; the World Bank projection of a further 20% decline in overall water resources by 2050 is at the more conservative end of the projection range.

The Iraqi federal government has formally adopted a National Adaptation Plan and is a party to the United Nations Framework Convention on Climate Change. The 2021 Iraqi NDC (Nationally Determined Contribution) under the Paris Agreement committed to specific emissions-reduction targets conditional on international finance. National climate strategy has been led by the Ministry of Environment, with cross-ministerial coordination on adaptation. At the provincial level, Nineveh has not yet produced a published climate adaptation plan; this is an area where the wider Iraqi system is significantly behind regional peers.

viii. Climate, agriculture and the food economy

The connection between climate and Nineveh's agricultural and food economy is direct. The Jazira wheat belt (Economy, § iii) is rain-fed and therefore directly dependent on the November–April precipitation cycle; in dry years the area harvested and the yield per hectare both decline, with consequential effects on the provincial and national wheat supply. Livestock, particularly sheep and goats, depends on the steppe grazing of the spring and early summer, which is itself dependent on the rainfall of the preceding winter. The orchards and irrigated cropping of the Tigris valley depend on the river's flow, which is sensitive both to upstream conditions and to local climate.

The longer-term outlook for Nineveh's rural economy is shaped substantially by climate. Even with the recent recovery in wheat output, the structural trends — rising temperatures, declining water availability, increasing extreme-weather frequency — point toward an agricultural system that will need substantial adaptation to remain productive through mid-century. Drought-resistant wheat varieties, more efficient irrigation, water-storage infrastructure, climate-smart agricultural extension and crop-insurance schemes are all components of the adaptation response that is now being designed nationally and that will need to be implemented at the provincial level if the Jazira wheat belt is to remain viable at its current scale.

The interplay between climate change and migration is also significant for Nineveh. The International Organization for Migration's 2022 report on Migration, Environment and Climate Change in Iraq documents the role of climate stressors in driving rural-to-urban migration and in compounding the displacement effects of conflict; this is an emerging concern for Nineveh's rural districts and one that interacts with the displacement and return dynamics that are themselves the legacy of 2014–2017 (Religions, § viii; Heritage, § i).

ix. Weather services and monitoring

Iraq's meteorological infrastructure is provided by the Iraqi Meteorological Organization and Seismology (IMOS), based in Baghdad and operating a network of monitoring stations across the country. The Mosul station, located near the airport on the western edge of the city, has been a long-period climate-record station and is one of the principal sources of long-term Iraqi climate data for international datasets including those of the European Centre for Medium-Range Weather Forecasts (ECMWF), the World Meteorological Organization, the NOAA Global Historical Climatology Network, and the CRU dataset of the University of East Anglia.

Forecast and early-warning capacity in Iraq has improved substantially in the 2020s, with the IMOS issuing routine weather forecasts, summer heatwave advisories, dust-storm warnings and seasonal climate outlooks. Internationally-sourced satellite data — particularly from MODIS (NASA), Sentinel (ESA) and the European Centre for Medium-Range Weather Forecasts — is integrated into Iraqi operational forecasting. The University of Mosul's Atmospheric Science programme and the College of Environmental Sciences at the University of Mosul are the principal academic centres for climate-related research in Nineveh, alongside related programmes at Tikrit, Baghdad and the Iraqi Centre for Strategic Studies.

The gap between operational meteorological capacity and the scale of climate adaptation needs in Iraq is substantial. Regional cooperation under the UN Framework Convention on Climate Change, the World Meteorological Organization's regional Arab Region program, the World Bank's Iraq Country Partnership Framework, and bilateral cooperation with Turkey, Iran and Syria on transboundary water and dust questions are all part of the institutional response. The next 25 years will determine whether the institutional capacity grows fast enough to keep pace with the climate trends already in motion.

Nineveh's climate in 2026 is what it has always been: a continental, hot semi-arid climate moderated by the Tigris and by the northeastern foothills, sharply seasonal in precipitation, with bitterly hot summers and mild wet winters. But the historical pattern is shifting visibly. The temperatures of the 2020s are not the temperatures of the 1980s. The dust days have doubled in frequency. The water is contracting. The next quarter-century will be one in which the climate that produced Mosul as a city and the Jazira as a wheat belt is itself being remade. How well the province adapts to this remaking is one of the principal questions for the longer-term future of Nineveh.

References

1. International Energy Agency (2024). National Climate Resilience Assessment for Iraq. Paris: IEA. Climate-hazard classification, dusty-days trend, three-zone climate framework.
2. Climates to Travel (2025). "Iraq climate: temperature, rain, when to go" — Mosul January 8 °C, July 43 °C with peaks 47–48 °C, annual 355 mm rainfall, dust storms.
3. Weather2Travel.com (2025). "Mosul weather by month: climate averages" — Mosul long-period averages from Met Office / CRU University of East Anglia / Netherlands Meteorological Institute.
4. Encyclopedia Britannica (2025). "Iraq — Desert, Arid, Hot" — Mosul January range −4 to 17 °C, historical low −11 °C, northeastern foothills precipitation 300–560 mm.
5. Worlddata.info (2025). "Climate and temperatures in Iraq" — Mosul 7.3 mm-per-day record, recent monthly comparison data 1949–2025.
6. Sunheron (2026). "Mosul weather and climate" — monthly temperature and precipitation, peak July ~45 °C, January night ~4 °C.
7. Upper Euphrates Center for Sustainable Development Research, University of Anbar (14 July 2025). "Clarification regarding the current heatwave" — global station rankings July 2025, Iraq among hottest stations worldwide at 50.7 °C peak, Baghdad and Mosul among heatwave-affected cities.
8. Al-Jiboori, M.H. and Deagan, E.M. (2025). "Characteristics of the cloud liquid water content profiles over Mosul, Iraq". Environmental Protection and Natural Resources. doi:10.2478/oszn-2025-0009.
9. Al-Sakkaf, A.S. et al. (2024). "Assessing exposure to climate extremes over the Arabian Peninsula using ERA5 reanalysis data". Atmospheric Research. doi:10.1016/j.atmosres.2024.107224.
10. Theoretical and Applied Climatology (2025). "A new metric: average extreme heat intensity used as indication of climate change signals in arid environment (Iraq)". doi:10.1007/s00704-025-05711-9.
11. Khidher, S.A. (2024). "Dust Storms in Iraq: Past and Present". Theoretical and Applied Climatology 155, 4721–4735. doi:10.1007/s00704-024-04886-x.
12. NASA Earth Observatory (April 2025). "Dust Storm Sweeps Through Iraq" — MODIS satellite imagery and analysis of the April 2025 dust event.
13. Shafaq News (May 2025). "Iraq's dust storms: deep environmental and political fault lines" — 2025 storm season early arrival, 3,700+ hospital admissions in April, dusty days trajectory.
14. The New Region (April 2025). "Iraq could face over 100 days of dust storms this season" — Iraq Green Observatory projection.
15. Al Jazeera (July 2025). "Sand, dust storms affect about 330 million people due to climate change: UN" — WMO statement, UN Decade designation 2025–2034, MENA regional cost $150bn annually.
16. Atlantic Council (June 2022). "Iraq's sandstorms are threatening life in the Fertile Crescent" — 243→272 dusty days, 300 by 2050, 71% Fertile Crescent agricultural land threatened.
17. Planetary Security Initiative (2024). "Sandstorms and Desertification: Instability in the South of Iraq" — 30–40% Tigris/Euphrates flow decline over 40 years, World Bank 20% further decline projection by 2050.
18. International Organization for Migration (2022). Migration, Environment, and Climate Change in Iraq. Baghdad: IOM Iraq.
19. World Bank Climate Change Knowledge Portal — country profile for Iraq, temperature and precipitation projections to 2050 under multiple emissions scenarios.
20. Al-Dabbas, M.A., Abbas, M.A., and Al-Khafaji, R.M. (2012). "Dust storms loads analyses—Iraq". Arabian Journal of Geosciences 5(1), 121–131. doi:10.1007/s12517-010-0181-7.