Golestān climate

Name: Golestān
Address: IR

Golestān is warmest in July, with average highs of 37 °C, and coldest in January, when nights average -3.2 °C. March is the wettest month (54 mm) and September the driest (1.3 mm). Figures are 1991–2020 climate normals.

Across a full year Golestān averages 302 mm of rain, 171 days above 25 °C and 74 days below freezing.

Iran · population 240,000 · 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 -3.2 °C
Driest month September 1 mm
Wettest month March 54 mm
Least cloud August 6 % cloud
Hottest on record July 43 °C
Coldest on record January -24 °C

What to expectGolestān through the year

Golestān has a clear annual cycle: average daily highs run from 8.1 °C in January to 37 °C in July, a swing of 29 °C in mean temperature across the year.

Counted across a normal year, 171 days a year reach 25 °C, 129 of them reach 30 °C, 74 nights drop below freezing. The warmest reading in the 1991–2020 record is 43 °C, in July.

Rain is strongly seasonal. March averages 54 mm against 1 mm in September — 40 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	8.1 °C	41 mm	38 %
February	10.7 °C	41 mm	39 %
March	16.2 °C	54 mm	43 %
April	22.5 °C	42 mm	44 %
May	28.9 °C	15 mm	34 %
June	34.9 °C	2 mm	13 %
July	37.5 °C	1 mm	10 %
August	36.4 °C	1 mm	6 %
September	31.7 °C	1 mm	6 %
October	24.5 °C	17 mm	24 %
November	15.3 °C	43 mm	37 %
December	9.9 °C	43 mm	41 %

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	8.1 °C	-3.2 °C	2.2 °C	17.1 °C	-24.4 °C	0	0	26
February	10.7 °C	-1.5 °C	4.5 °C	23.5 °C	-19.3 °C	0	0	20
March	16.2 °C	2.8 °C	9.7 °C	31.8 °C	-20.0 °C	1	0	6
April	22.5 °C	8.3 °C	15.9 °C	34.0 °C	-1.2 °C	9	2	0
May	28.9 °C	14.1 °C	22.4 °C	37.5 °C	1.8 °C	26	14	0
June	34.9 °C	19.7 °C	28.3 °C	42.2 °C	10.9 °C	30	29	0
July	37.5 °C	23.1 °C	31.2 °C	43.0 °C	15.7 °C	31	31	0
August	36.4 °C	22.0 °C	30.1 °C	41.7 °C	12.5 °C	31	31	0
September	31.7 °C	17.4 °C	25.2 °C	37.8 °C	10.6 °C	29	22	0
October	24.5 °C	11.3 °C	18.3 °C	33.2 °C	4.1 °C	14	2	0
November	15.3 °C	4.2 °C	9.8 °C	26.4 °C	-6.5 °C	0	0	4
December	9.9 °C	-0.5 °C	4.4 °C	19.9 °C	-10.6 °C	0	0	18

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	41 mm	7	10 h/day	38 %	65 %	11 km/h
February	41 mm	8	11 h/day	39 %	63 %	13 km/h
March	54 mm	9	12 h/day	43 %	56 %	15 km/h
April	42 mm	7	13 h/day	44 %	48 %	16 km/h
May	15 mm	3	14 h/day	34 %	34 %	17 km/h
June	2 mm	1	15 h/day	13 %	24 %	17 km/h
July	1 mm	0	14 h/day	10 %	23 %	17 km/h
August	1 mm	0	14 h/day	6 %	23 %	15 km/h
September	1 mm	0	12 h/day	6 %	26 %	14 km/h
October	17 mm	3	11 h/day	24 %	38 %	12 km/h
November	43 mm	7	10 h/day	37 %	58 %	11 km/h
December	43 mm	7	9.8 h/day	41 %	67 %	10 km/h

How Golestān 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
Golestān	37 °C	-3.2 °C	302 mm	171
Eslamshahr · Iran	37 °C	-3.5 °C	313 mm	168
Shahrīār · Iran	36 °C	-4.8 °C	291 mm	157
Tehran · Iran	36 °C	-5.0 °C	346 mm	156
Fardīs · Iran	35 °C	-5.6 °C	290 mm	151
Qarchak · Iran	38 °C	-2.5 °C	278 mm	176
Karaj · Iran	35 °C	-6.0 °C	288 mm	147

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

QuestionsCommon questions about Golestān’s climate

When is the best time to visit Golestān?

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 Golestān get?

In July, the warmest month, daily highs average 37 °C. About 129 days a year pass 30 °C. The highest value in the 1991–2020 record is 43 °C.

How cold does it get in winter?

Nights average -3.2 °C in January, the coldest month. A normal year has 74 nights below freezing.

Which month is wettest in Golestān?

March, averaging 54 mm over 9 days with rain. The driest month is September with 1 mm. The year as a whole averages 302 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 Golestān 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.