Isfahan climate

Name: Isfahan
Address: IR

Isfahan is warmest in July, with average highs of 37 °C, and coldest in January, when nights average -3.6 °C. March is the wettest month (17 mm) and August the driest (0.04 mm). Figures are 1991–2020 climate normals.

Across a full year Isfahan averages 98 mm of rain, 173 days above 25 °C and 90 days below freezing.

Iran · population 1,547,164 · 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 37 °C
Coldest month January -3.6 °C
Driest month August 0 mm
Wettest month March 17 mm
Least cloud September 5 % cloud
Hottest on record August 42 °C
Coldest on record January -19 °C

What to expectIsfahan through the year

Isfahan has a clear annual cycle: average daily highs run from 8.5 °C in January to 37 °C in July, a swing of 28 °C in mean temperature across the year.

Counted across a normal year, 173 days a year reach 25 °C, 125 of them reach 30 °C, 90 nights drop below freezing. The warmest reading in the 1991–2020 record is 42 °C, in August.

Rain is spread fairly evenly through the year, from 0 mm in August to 17 mm in March. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	8.5 °C	17 mm	33 %
February	12.2 °C	12 mm	30 %
March	17.3 °C	17 mm	35 %
April	23.2 °C	11 mm	39 %
May	28.9 °C	7 mm	30 %
June	34.5 °C	1 mm	11 %
July	36.9 °C	under 1 mm	12 %
August	35.5 °C	under 1 mm	7 %
September	31.4 °C	under 1 mm	5 %
October	24.5 °C	3 mm	18 %
November	15.8 °C	16 mm	32 %
December	10.3 °C	14 mm	34 %

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	8.5 °C	-3.6 °C	2.2 °C	19.5 °C	-18.7 °C	0	0	29
February	12.2 °C	-1.8 °C	5.1 °C	23.6 °C	-13.4 °C	0	0	22
March	17.3 °C	2.2 °C	10.2 °C	30.7 °C	-7.0 °C	1	0	9
April	23.2 °C	8.0 °C	16.2 °C	31.7 °C	-2.4 °C	10	0	0
May	28.9 °C	13.5 °C	22.0 °C	36.4 °C	5.7 °C	27	12	0
June	34.5 °C	18.7 °C	27.6 °C	40.3 °C	10.0 °C	30	29	0
July	36.9 °C	21.9 °C	30.3 °C	41.2 °C	17.1 °C	31	31	0
August	35.5 °C	20.5 °C	28.9 °C	41.8 °C	11.7 °C	31	31	0
September	31.4 °C	15.6 °C	24.3 °C	37.5 °C	8.7 °C	30	22	0
October	24.5 °C	9.6 °C	17.5 °C	32.7 °C	2.1 °C	14	1	0
November	15.8 °C	2.8 °C	9.5 °C	25.4 °C	-6.3 °C	0	0	7
December	10.3 °C	-1.7 °C	4.2 °C	22.4 °C	-10.5 °C	0	0	24

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	17 mm	3	10 h/day	33 %	56 %	11 km/h
February	12 mm	3	11 h/day	30 %	49 %	15 km/h
March	17 mm	4	12 h/day	35 %	42 %	18 km/h
April	11 mm	3	13 h/day	39 %	35 %	18 km/h
May	7 mm	2	14 h/day	30 %	26 %	19 km/h
June	1 mm	0	14 h/day	11 %	16 %	17 km/h
July	under 1 mm	0	14 h/day	12 %	16 %	17 km/h
August	under 1 mm	0	13 h/day	7 %	16 %	15 km/h
September	under 1 mm	0	12 h/day	5 %	18 %	13 km/h
October	3 mm	1	11 h/day	18 %	30 %	12 km/h
November	16 mm	2	10 h/day	32 %	49 %	10 km/h
December	14 mm	3	10 h/day	34 %	59 %	9.6 km/h

How Isfahan 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
Isfahan	37 °C	-3.6 °C	98 mm	173
Shāhīn Shahr · Iran	36 °C	-3.1 °C	120 mm	166
Najafābād · Iran	37 °C	-5.4 °C	144 mm	170
Kashan · Iran	38 °C	-0.2 °C	185 mm	181

Where Isfahan ranks

Ranking	Position	Value
The driest places in Asia in August	21st of 50	0.04 mm
The driest places in Asia in September	30th of 50	0.2 mm
The driest places in Asia year-round	32nd of 50	8.1 mm
The driest places in Asia in October	38th of 50	2.7 mm
The driest places in the world in August	47th of 50	0.04 mm
The driest places in the world in September	48th of 50	0.2 mm

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

QuestionsCommon questions about Isfahan’s climate

When is the best time to visit Isfahan?

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 Isfahan get?

In July, the warmest month, daily highs average 37 °C. About 125 days a year pass 30 °C. The highest value in the 1991–2020 record is 42 °C.

How cold does it get in winter?

Nights average -3.6 °C in January, the coldest month. A normal year has 90 nights below freezing.

Which month is wettest in Isfahan?

March, averaging 17 mm over 4 days with rain. The driest month is August with 0 mm. The year as a whole averages 98 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 Isfahan 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: 32.652°, 51.675° (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.