Deir ez-Zor climate

Name: Deir ez-Zor
Address: SY

Deir ez-Zor is warmest in July, with average highs of 40 °C, and coldest in January, when nights average 3.3 °C. January is the wettest month (26 mm) and July the driest (0.05 mm). Figures are 1991–2020 climate normals.

Across a full year Deir ez-Zor averages 149 mm of rain, 202 days above 25 °C and 10 days below freezing.

Syria · population 271,800 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 40 °C
Coldest month January 3.3 °C
Driest month July 0 mm
Wettest month January 26 mm
Least cloud August 1 % cloud
Hottest on record July 47 °C
Coldest on record January -4.9 °C

What to expectDeir ez-Zor through the year

Deir ez-Zor has a clear annual cycle: average daily highs run from 12 °C in January to 40 °C in July, a swing of 26 °C in mean temperature across the year.

Counted across a normal year, 202 days a year reach 25 °C, 164 of them reach 30 °C, 10 nights drop below freezing. The warmest reading in the 1991–2020 record is 47 °C, in July.

Rain is spread fairly evenly through the year, from 0 mm in July to 26 mm in January. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	12.4 °C	26 mm	43 %
February	15.0 °C	24 mm	39 %
March	20.4 °C	21 mm	37 %
April	26.5 °C	13 mm	34 %
May	32.4 °C	9 mm	23 %
June	37.3 °C	under 1 mm	4 %
July	40.3 °C	under 1 mm	1 %
August	40.0 °C	under 1 mm	1 %
September	35.7 °C	under 1 mm	4 %
October	29.2 °C	10 mm	22 %
November	19.9 °C	21 mm	34 %
December	13.8 °C	25 mm	44 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	12.4 °C	3.3 °C	7.6 °C	20.9 °C	-4.9 °C	0	0	5
February	15.0 °C	4.6 °C	9.7 °C	26.7 °C	-4.9 °C	0	0	3
March	20.4 °C	8.6 °C	14.6 °C	37.1 °C	-0.5 °C	4	1	0
April	26.5 °C	13.5 °C	20.4 °C	40.0 °C	2.1 °C	17	7	0
May	32.4 °C	19.0 °C	26.2 °C	42.4 °C	11.5 °C	30	22	0
June	37.3 °C	23.6 °C	31.0 °C	45.4 °C	16.4 °C	30	30	0
July	40.3 °C	26.1 °C	33.6 °C	47.3 °C	20.2 °C	31	31	0
August	40.0 °C	26.1 °C	33.4 °C	46.4 °C	20.7 °C	31	31	0
September	35.7 °C	22.8 °C	29.5 °C	44.3 °C	11.9 °C	30	29	0
October	29.2 °C	17.4 °C	23.4 °C	38.2 °C	7.1 °C	26	14	0
November	19.9 °C	9.4 °C	14.5 °C	30.1 °C	-1.0 °C	3	0	0
December	13.8 °C	4.8 °C	9.1 °C	24.6 °C	-4.8 °C	0	0	3

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	26 mm	6	10 h/day	43 %	75 %	16 km/h
February	24 mm	5	11 h/day	39 %	66 %	18 km/h
March	21 mm	4	12 h/day	37 %	52 %	20 km/h
April	13 mm	3	13 h/day	34 %	40 %	22 km/h
May	9 mm	2	14 h/day	23 %	32 %	23 km/h
June	under 1 mm	0	15 h/day	4 %	26 %	27 km/h
July	under 1 mm	0	14 h/day	1 %	27 %	29 km/h
August	under 1 mm	0	14 h/day	1 %	29 %	25 km/h
September	under 1 mm	0	12 h/day	4 %	31 %	20 km/h
October	10 mm	2	11 h/day	22 %	40 %	16 km/h
November	21 mm	3	10 h/day	34 %	59 %	14 km/h
December	25 mm	5	9.8 h/day	44 %	73 %	14 km/h

How Deir ez-Zor compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Deir ez-Zor	40 °C	3.3 °C	149 mm	202
Ar Raqqah · Syria	40 °C	2.6 °C	187 mm	195
Al Ḩasakah · Syria	41 °C	2.0 °C	291 mm	191
Kızıltepe · Turkey	40 °C	0.8 °C	413 mm	175
Viranşehir · Turkey	39 °C	1.2 °C	428 mm	171
Al Qāmishlī · Syria	40 °C	0.9 °C	418 mm	177
Şanlıurfa · Turkey	39 °C	1.1 °C	491 mm	170

Where Deir ez-Zor ranks

Ranking	Position	Value
The driest places in Asia in July	32nd of 50	0.05 mm
Places with the best weather in Asia in March	43rd of 50	91/100
The warmest places in Asia in August	43rd of 50	40 °C
The warmest places in Asia in July	46th of 50	40 °C

Planning a trip? See the best time to visit Deir ez-Zor.

QuestionsCommon questions about Deir ez-Zor’s climate

When is the best time to visit Deir ez-Zor?

That depends on what you want, so the honest answer is a comparison rather than a single month. March, April, October sit closest to 20 °C on average, July is the warmest month and July the driest. The month-by-month table above has the full picture.

How hot does Deir ez-Zor get?

In July, the warmest month, daily highs average 40 °C. About 164 days a year pass 30 °C. The highest value in the 1991–2020 record is 47 °C.

How cold does it get in winter?

Nights average 3.3 °C in January, the coldest month. A normal year has 10 nights below freezing.

Which month is wettest in Deir ez-Zor?

January, averaging 26 mm over 6 days with rain. The driest month is July with 0 mm. The year as a whole averages 149 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Deir ez-Zor rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 35.336°, 40.141° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.