Hamadān climate

Name: Hamadān
Address: IR

Hamadān is warmest in July, with average highs of 35 °C, and coldest in January, when nights average -4.9 °C. March is the wettest month (74 mm) and August the driest (1.3 mm). Figures are 1991–2020 climate normals.

Across a full year Hamadān averages 410 mm of rain, 137 days above 25 °C and 91 days below freezing.

Iran · population 528,256 · 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 -4.9 °C
Driest month August 1 mm
Wettest month March 74 mm
Least cloud September 8 % cloud
Hottest on record July 40 °C
Coldest on record February -20 °C

What to expectHamadān through the year

Hamadān has a clear annual cycle: average daily highs run from 3.4 °C in January to 35 °C in July, a swing of 29 °C in mean temperature across the year.

Counted across a normal year, 137 days a year reach 25 °C, 91 of them reach 30 °C, 91 nights drop below freezing. The warmest reading in the 1991–2020 record is 40 °C, in July.

Rain is strongly seasonal. March averages 74 mm against 1 mm in August — 59 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	3.4 °C	47 mm	49 %
February	5.3 °C	56 mm	47 %
March	11.2 °C	74 mm	47 %
April	17.4 °C	66 mm	46 %
May	23.6 °C	37 mm	34 %
June	30.7 °C	4 mm	13 %
July	34.7 °C	1 mm	16 %
August	34.2 °C	1 mm	15 %
September	29.2 °C	2 mm	8 %
October	21.7 °C	23 mm	26 %
November	12.6 °C	49 mm	42 %
December	6.8 °C	50 mm	47 %

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	3.4 °C	-4.9 °C	-1.0 °C	15.0 °C	-18.6 °C	0	0	28
February	5.3 °C	-3.7 °C	0.6 °C	17.8 °C	-20.5 °C	0	0	24
March	11.2 °C	0.7 °C	5.8 °C	24.7 °C	-13.4 °C	0	0	13
April	17.4 °C	5.9 °C	11.6 °C	28.5 °C	-10.3 °C	1	0	2
May	23.6 °C	11.3 °C	17.6 °C	33.2 °C	0.7 °C	12	1	0
June	30.7 °C	16.9 °C	24.1 °C	38.1 °C	8.7 °C	29	18	0
July	34.7 °C	20.4 °C	27.9 °C	40.2 °C	14.0 °C	31	30	0
August	34.2 °C	20.4 °C	27.4 °C	38.8 °C	10.1 °C	31	30	0
September	29.2 °C	16.0 °C	22.6 °C	35.9 °C	5.9 °C	28	12	0
October	21.7 °C	10.1 °C	15.6 °C	29.0 °C	0.4 °C	6	0	0
November	12.6 °C	3.1 °C	7.4 °C	22.4 °C	-9.3 °C	0	0	5
December	6.8 °C	-1.7 °C	2.1 °C	20.1 °C	-18.3 °C	0	0	20

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	47 mm	9	10 h/day	49 %	70 %	10 km/h
February	56 mm	9	11 h/day	47 %	69 %	12 km/h
March	74 mm	11	12 h/day	47 %	62 %	16 km/h
April	66 mm	12	13 h/day	46 %	56 %	18 km/h
May	37 mm	8	14 h/day	34 %	42 %	18 km/h
June	4 mm	1	14 h/day	13 %	26 %	16 km/h
July	1 mm	0	14 h/day	16 %	22 %	16 km/h
August	1 mm	0	13 h/day	15 %	21 %	15 km/h
September	2 mm	1	12 h/day	8 %	24 %	14 km/h
October	23 mm	5	11 h/day	26 %	40 %	14 km/h
November	49 mm	8	10 h/day	42 %	59 %	12 km/h
December	50 mm	8	9.8 h/day	47 %	66 %	10 km/h

How Hamadān 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
Hamadān	35 °C	-4.9 °C	410 mm	137
Malāyer · Iran	34 °C	-6.9 °C	361 mm	133
Borūjerd · Iran	35 °C	-5.2 °C	512 mm	145
Arāk · Iran	34 °C	-6.6 °C	263 mm	139
Kermanshah · Iran	37 °C	-2.9 °C	500 mm	154
Khorramabad · Iran	38 °C	-3.0 °C	573 mm	169
Sanandaj · Iran	35 °C	-7.1 °C	428 mm	140

Where Hamadān ranks

Ranking	Position	Value
Places with the best weather in Asia in October	39thof 50	96/100
Places with the best weather in the world in October	49thof 50	96/100

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

QuestionsCommon questions about Hamadān’s climate

When is the best time to visit Hamadān?

That depends on what you want, so the honest answer is a comparison rather than a single month. May, June, September 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 Hamadān get?

In July, the warmest month, daily highs average 35 °C. About 91 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 -4.9 °C in January, the coldest month. A normal year has 91 nights below freezing.

Which month is wettest in Hamadān?

March, averaging 74 mm over 11 days with rain. The driest month is August with 1 mm. The year as a whole averages 410 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 Hamadān 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.