Sirjan climate

Name: Sirjan
Address: IR

Sirjan is warmest in July, with average highs of 35 °C, and coldest in January, when nights average -0.9 °C. February is the wettest month (40 mm) and September the driest (0.1 mm). Figures are 1991–2020 climate normals.

Across a full year Sirjan averages 172 mm of rain, 176 days above 25 °C and 50 days below freezing.

Iran · population 199,704 · 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 35 °C
Coldest month January -0.9 °C
Driest month September 0 mm
Wettest month February 40 mm
Least cloud September 6 % cloud
Hottest on record July 40 °C
Coldest on record January -10 °C

What to expectSirjan through the year

Sirjan has a clear annual cycle: average daily highs run from 11 °C in January to 35 °C in July, a swing of 24 °C in mean temperature across the year.

Counted across a normal year, 176 days a year reach 25 °C, 122 of them reach 30 °C, 50 nights drop below freezing. The warmest reading in the 1991–2020 record is 40 °C, in July.

Rain is strongly seasonal. February averages 40 mm against 0 mm in September — 344 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	11.0 °C	36 mm	34 %
February	13.5 °C	40 mm	32 %
March	17.6 °C	36 mm	34 %
April	23.4 °C	13 mm	35 %
May	29.3 °C	3 mm	22 %
June	33.9 °C	1 mm	10 %
July	35.2 °C	1 mm	14 %
August	33.9 °C	2 mm	9 %
September	30.5 °C	under 1 mm	6 %
October	24.6 °C	2 mm	10 %
November	17.7 °C	11 mm	26 %
December	13.4 °C	26 mm	30 %

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	11.0 °C	-0.9 °C	5.0 °C	21.1 °C	-10.5 °C	0	0	20
February	13.5 °C	0.7 °C	7.2 °C	24.2 °C	-9.4 °C	0	0	13
March	17.6 °C	4.1 °C	11.2 °C	29.6 °C	-5.0 °C	1	0	3
April	23.4 °C	9.2 °C	17.0 °C	31.9 °C	-0.1 °C	11	0	0
May	29.3 °C	14.5 °C	22.9 °C	37.5 °C	6.9 °C	29	14	0
June	33.9 °C	18.8 °C	27.4 °C	39.1 °C	11.0 °C	30	28	0
July	35.2 °C	20.7 °C	28.9 °C	39.6 °C	14.1 °C	31	31	0
August	33.9 °C	18.9 °C	27.2 °C	39.5 °C	12.8 °C	31	31	0
September	30.5 °C	15.4 °C	23.6 °C	36.5 °C	7.6 °C	30	18	0
October	24.6 °C	10.4 °C	18.0 °C	31.4 °C	2.5 °C	14	0	0
November	17.7 °C	4.6 °C	11.3 °C	25.1 °C	-3.6 °C	0	0	2
December	13.4 °C	0.8 °C	7.0 °C	23.3 °C	-8.0 °C	0	0	12

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	36 mm	6	10 h/day	34 %	56 %	18 km/h
February	40 mm	6	11 h/day	32 %	52 %	21 km/h
March	36 mm	6	12 h/day	34 %	45 %	22 km/h
April	13 mm	3	13 h/day	35 %	33 %	22 km/h
May	3 mm	1	14 h/day	22 %	20 %	20 km/h
June	1 mm	0	14 h/day	10 %	15 %	20 km/h
July	1 mm	0	14 h/day	14 %	19 %	21 km/h
August	2 mm	1	13 h/day	9 %	18 %	21 km/h
September	under 1 mm	0	12 h/day	6 %	18 %	18 km/h
October	2 mm	0	11 h/day	10 %	25 %	16 km/h
November	11 mm	2	11 h/day	26 %	40 %	16 km/h
December	26 mm	3	10 h/day	30 %	49 %	16 km/h

How Sirjan 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
Sirjan	35 °C	-0.9 °C	172 mm	176
Kerman · Iran	35 °C	-0.1 °C	117 mm	176
Bandar Abbas · Iran	40 °C	13 °C	193 mm	296
Yazd · Iran	38 °C	0.2 °C	100 mm	197
Shiraz · Iran	37 °C	0.7 °C	380 mm	184

Where Sirjan ranks

Ranking	Position	Value
The driest places in Asia in September	20thof 50	0.1 mm
The driest places in Asia in October	32ndof 50	2.4 mm
The driest places in the world in September	37thof 50	0.1 mm

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

QuestionsCommon questions about Sirjan’s climate

When is the best time to visit Sirjan?

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 September the driest. The month-by-month table above has the full picture.

How hot does Sirjan get?

In July, the warmest month, daily highs average 35 °C. About 122 days a year pass 30 °C. The highest value in the 1991–2020 record is 40 °C.

How cold does it get in winter?

Nights average -0.9 °C in January, the coldest month. A normal year has 50 nights below freezing.

Which month is wettest in Sirjan?

February, averaging 40 mm over 6 days with rain. The driest month is September with 0 mm. The year as a whole averages 172 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 Sirjan 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
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.