Deir ez-Zor climate
Deir ez-Zor (Syria) has a hot desert climate (Köppen BWh). The average temperature over the year is 20 °C69 °F, and about 157 mm6.2 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Deir ez-Zor climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 1254 | 133 | 643 | 261.0 | 11 |
| Feb | 1559 | 337 | 948 | 230.9 | 6 |
| Mar | 2169 | 744 | 1457 | 220.9 | 1 |
| Apr | 2780 | 1253 | 1966 | 170.7 | 0 |
| May | 3391 | 1763 | 2577 | 100.4 | 0 |
| Jun | 38101 | 2272 | 3086 | 10.0 | 0 |
| Jul | 41106 | 2577 | 3392 | 00.0 | 0 |
| Aug | 41105 | 2577 | 3391 | 00.0 | 0 |
| Sep | 3698 | 2170 | 2984 | 10.0 | 0 |
| Oct | 3086 | 1661 | 2373 | 140.5 | 0 |
| Nov | 2068 | 846 | 1457 | 180.7 | 1 |
| Dec | 1456 | 337 | 846 | 261.0 | 8 |
| Year | 41106 | 133 | 2069 | 1576.2 | 26 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 71% | 45% | 2.7 | 10:01 |
| Feb | 66% | 48% | 3.6 | 10:51 |
| Mar | 56% | 46% | 4.9 | 11:52 |
| Apr | 48% | 46% | 6.0 | 13:02 |
| May | 40% | 37% | 7.1 | 14:01 |
| Jun | 31% | 14% | 8.0 | 14:32 |
| Jul | 30% | 10% | 7.8 | 14:19 |
| Aug | 32% | 11% | 7.0 | 13:29 |
| Sep | 33% | 12% | 5.9 | 12:21 |
| Oct | 39% | 31% | 4.3 | 11:13 |
| Nov | 56% | 36% | 3.2 | 10:15 |
| Dec | 67% | 44% | 2.5 | 9:47 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Deir ez-Zor is like
The warmest month is July, with an average high of 41 °C106 °F and a low of 25 °C77 °F. The coldest is January, when highs average 12 °C54 °F and lows 1 °C33 °F. Seasons are strongly marked: the warmest month is on average 26.8 °C48.2 °F warmer than the coldest.
It is dry, with about 157 mm6.2 in of precipitation per year. The wettest three-month stretch is December–February, which brings 47% of the annual total. Months with less than 20 mm0.8 in on average: April–November. The wettest month is January (26 mm1.0 in), the driest is July (0 mm0.0 in).
Relative humidity ranges from 30% in July to 71% in January. The clearest skies (lowest average cloud amount, 10%) are typical of July. Average wind speed near the ground ranges from 7 km/h (5 mph) in November to 18 km/h (11 mph) in July. Daylight lasts from about 9.8 hours in December to 14.5 hours in June.
Best time to visit Deir ez-Zor
Based on these averages, the most comfortable months for sightseeing and outdoor activities are March and April and October and November: average highs of 20 °C68 °F to 30 °C86 °F with 14 mm0.5 in to 22 mm0.9 in of precipitation per month.
The most challenging month is July, which is hot, with average highs of 41 °C106 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Deir ez-Zor
- Winter (December–February) — highs 1254 to 15 °C59 °F, lows 133 to 3 °C37 °F, about 25 mm1.0 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 2169 to 33 °C91 °F, lows 744 to 17 °C63 °F, about 17 mm0.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 38101 to 41 °C106 °F, lows 2272 to 25 °C77 °F, about 0 mm0.0 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Autumn (September–November) — highs 2068 to 36 °C98 °F, lows 846 to 21 °C70 °F, about 11 mm0.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
How Deir ez-Zor compares
Compared with Ar Raqqah, about 123 km to the northwest, Deir ez-Zor is on average 1 °C1.7 °F warmer and receives 43% less precipitation (157 mm6.2 in vs 276 mm11 in). The difference is largest in May (1.9 °C3.4 °F warmer).
Of the 12 places in Syria covered by World Climates, Deir ez-Zor is the 3rd warmest by annual mean temperature and the 12th wettest by annual precipitation. See all of them on the Syria climate page.
Places in other countries with the most similar temperature and rainfall pattern: Ash Sharqat (Iraq, BWh), Kashan (Iran, BWh) and Kashan (Iran, BWh).
Nearby places
- Ar Raqqah 123 km · 19 °C67 °F · 276 mm11 in
- Al Hasakah 141 km · 20 °C68 °F · 219 mm8.6 in
- Kızıltepe 210 km · 19 °C65 °F · 292 mm11 in
- Viranşehir 213 km · 18 °C65 °F · 327 mm13 in
- Al Qamishli 214 km · 19 °C67 °F · 283 mm11 in
- Mardin 226 km · 14 °C58 °F · 407 mm16 in
- Şanlıurfa 237 km · 18 °C64 °F · 382 mm15 in
- Suruç 239 km · 18 °C64 °F · 429 mm17 in
Frequently asked questions
What is the warmest month in Deir ez-Zor?
July is the warmest month in Deir ez-Zor, with an average high of 41 °C (106 °F) and an average low of 25 °C (77 °F).
What is the coldest month in Deir ez-Zor?
January is the coldest month, with an average high of 12 °C (54 °F) and an average low of 1 °C (33 °F).
When does it rain the most in Deir ez-Zor?
January is the wettest month with about 26 mm (1.0 in) of precipitation; July is the driest with about 0 mm (0.0 in).
What is the best time to visit Deir ez-Zor?
Judging by long-term averages, the most comfortable months are March and April and October and November.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 301 m, while Deir ez-Zor lies at about 210 m. Temperatures on this page were therefore adjusted by +0.6 °C1.1 °F using the standard lapse rate of 6.5 °C per 1,000 m.