Sumayl climate

Name: Sumayl
Address: IQ

Sumayl is warmest in July, with average highs of 40 °C, and coldest in January, when nights average 0.5 °C. January is the wettest month (84 mm) and August the driest (0.2 mm). Figures are 1991–2020 climate normals.

Across a full year Sumayl averages 480 mm of rain, 176 days above 25 °C and 39 days below freezing.

Iraq · population 152,512 · 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 0.5 °C
Driest month August 0 mm
Wettest month January 84 mm
Least cloud August 3 % cloud
Hottest on record July 45 °C
Coldest on record February -16 °C

What to expectSumayl through the year

Sumayl has a clear annual cycle: average daily highs run from 10 °C in January to 40 °C in July, a swing of 27 °C in mean temperature across the year.

Counted across a normal year, 176 days a year reach 25 °C, 137 of them reach 30 °C, 39 nights drop below freezing. The warmest reading in the 1991–2020 record is 45 °C, in July.

Rain is strongly seasonal. January averages 84 mm against 0 mm in August — 360 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	10.0 °C	84 mm	54 %
February	11.8 °C	76 mm	50 %
March	16.2 °C	82 mm	48 %
April	21.8 °C	58 mm	43 %
May	28.4 °C	25 mm	31 %
June	35.5 °C	1 mm	8 %
July	39.6 °C	under 1 mm	3 %
August	39.1 °C	under 1 mm	3 %
September	34.1 °C	1 mm	5 %
October	27.0 °C	24 mm	27 %
November	17.7 °C	53 mm	41 %
December	11.9 °C	74 mm	53 %

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	10.0 °C	0.5 °C	5.0 °C	20.3 °C	-13.7 °C	0	0	15
February	11.8 °C	1.2 °C	6.5 °C	21.3 °C	-15.9 °C	0	0	10
March	16.2 °C	4.4 °C	10.7 °C	28.4 °C	-9.0 °C	0	0	3
April	21.8 °C	9.0 °C	15.9 °C	35.6 °C	-1.8 °C	6	1	0
May	28.4 °C	14.2 °C	21.9 °C	38.7 °C	6.4 °C	24	12	0
June	35.5 °C	19.7 °C	28.5 °C	42.7 °C	13.0 °C	30	29	0
July	39.6 °C	23.5 °C	32.5 °C	45.4 °C	17.1 °C	31	31	0
August	39.1 °C	23.0 °C	31.8 °C	44.8 °C	17.9 °C	31	31	0
September	34.1 °C	18.7 °C	26.8 °C	41.1 °C	9.7 °C	30	27	0
October	27.0 °C	13.7 °C	20.3 °C	36.2 °C	4.9 °C	22	7	0
November	17.7 °C	6.7 °C	12.0 °C	27.5 °C	-5.1 °C	1	0	1
December	11.9 °C	2.3 °C	6.8 °C	25.2 °C	-15.6 °C	0	0	9

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	84 mm	10	9.9 h/day	54 %	76 %	11 km/h
February	76 mm	10	11 h/day	50 %	74 %	12 km/h
March	82 mm	10	12 h/day	48 %	70 %	13 km/h
April	58 mm	8	13 h/day	43 %	64 %	14 km/h
May	25 mm	4	14 h/day	31 %	52 %	14 km/h
June	1 mm	0	15 h/day	8 %	32 %	14 km/h
July	under 1 mm	0	14 h/day	3 %	26 %	13 km/h
August	under 1 mm	0	14 h/day	3 %	28 %	12 km/h
September	1 mm	0	12 h/day	5 %	34 %	12 km/h
October	24 mm	3	11 h/day	27 %	50 %	12 km/h
November	53 mm	6	10 h/day	41 %	68 %	10 km/h
December	74 mm	9	9.7 h/day	53 %	75 %	11 km/h

How Sumayl 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
Sumayl	40 °C	0.5 °C	480 mm	176
Dihok · Iraq	40 °C	0.1 °C	515 mm	175
Mosul · Iraq	43 °C	2.9 °C	380 mm	197
Erbil · Iraq	41 °C	1.3 °C	536 mm	191
Al Qāmishlī · Syria	40 °C	0.9 °C	418 mm	177
Ash Sharqāt · Iraq	43 °C	3.2 °C	234 mm	209
Van · Turkey	29 °C	-8.5 °C	400 mm	79

Planning a trip? See the best time to visit Sumayl.

QuestionsCommon questions about Sumayl’s climate

When is the best time to visit Sumayl?

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

How hot does Sumayl get?

In July, the warmest month, daily highs average 40 °C. About 137 days a year pass 30 °C. The highest value in the 1991–2020 record is 45 °C.

How cold does it get in winter?

Nights average 0.5 °C in January, the coldest month. A normal year has 39 nights below freezing.

Which month is wettest in Sumayl?

January, averaging 84 mm over 10 days with rain. The driest month is August with 0 mm. The year as a whole averages 480 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 Sumayl 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: 36.858°, 42.848° (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.