Gomīshān climate — normals and trends
Gomīshān (Iran) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 18.3 °C and it receives 588 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is August (27.6 °C on average) and the coldest is January (9.1 °C). Rainfall peaks in March.
Gomīshān averages 1 frost days, 27 hot days (≥ 30 °C) and 91 rainy days per year.
Gomīshān has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.7 °C (on 31 August 2008) and the coldest -5.1 °C (on 11 February 1969).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
GomīshānGolestan
- coords
- 37.07°, 54.08°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.3°C
Average daily high
20.2°C
Average daily low
16.6°C
Annual rainfall
588mm
Sunshine / day
9.9h
Mean relative humidity
77%
Average peak wind
18.4km/h
Seasonal range
18.5°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
27 d/yr
Rainy days (≥ 1 mm)
91 d/yr
Annual snowfall
4.1 cm
Average feels-like high
20.7 °C
Average feels-like low
16.2 °C
Average peak gust
26.7 km/h
Tropical nights (≥ 20 °C)
142 d/yr
Solar radiation
15.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.47 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
38.7 °C
31 August 2008
Coldest day
-5.1 °C
11 February 1969
Wettest day
98 mm
18 March 2019
Windiest day
57.4 km/h
18 March 2019
Strongest gust
89.3 km/h
16 May 2022
Hottest feels-like
44.8 °C
25 August 2008
Coldest feels-like
-11.3 °C
6 January 1969
Snowiest day
10.9 cm
19 January 1964
Sunniest day
13.5 h
21 June 1941
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 11.6 °C | +0.6 °C | 20 mm | -40 mm |
| Feb | 10.3 °C | -1.1 °C | 66 mm | +5 mm |
| Mar | 16.4 °C | +2.3 °C | 64 mm | -10 mm |
| Apr | 22.3 °C | +3.2 °C | 42 mm | -6 mm |
| May | 25.0 °C | +1.5 °C | 17 mm | -17 mm |
| Jun | 26.7 °C | +0.1 °C | 14 mm | -8 mm |
| Jul | 29.3 °C | +0.9 °C | 15 mm | -7 mm |
| Aug | 31.4 °C | +2.3 °C | 7 mm | -19 mm |
| Sep | 27.3 °C | +0.5 °C | 31 mm | -12 mm |
| Oct | 25.2 °C | +2.7 °C | 36 mm | -29 mm |
| Nov | 20.3 °C | +3.2 °C | 3 mm | -66 mm |
| Dec | 14.4 °C | +1.5 °C | 63 mm | -1 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Gomīshān?
Gomīshān has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 18.3 °C and it receives 588 mm of precipitation per year.
What is the hottest day ever recorded in Gomīshān?
The hottest day measured in Gomīshān between 1940 and 2025 was 31 August 2008, reaching 38.7 °C.
What is the coldest day in Gomīshān?
The coldest day measured in Gomīshān between 1940 and 2025 was 11 February 1969, at -5.1 °C.
Does it snow in Gomīshān?
Yes. Gomīshān gets on average 4.1 cm of snow per year and has around 1 frost days.
Has the climate of Gomīshān warmed?
Yes: Gomīshān warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gomīshān?
The wettest day measured in Gomīshān between 1940 and 2025 was 18 March 2019, with 98 mm of rain in 24 hours.
What was the windiest day in Gomīshān?
The windiest day measured in Gomīshān between 1940 and 2025 was 18 March 2019, with winds reaching 57.4 km/h.
What is the warmest month in Gomīshān?
The warmest month in Gomīshān is August (27.6 °C on average); the coldest is January (9.1 °C).
How much does it rain in Gomīshān?
Gomīshān receives on average 588 mm of precipitation per year, spread over about 91 rainy days.
Is it sunny in Gomīshān?
Gomīshān gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
What is the biggest single-day snowfall in Gomīshān?
The heaviest 24-hour snowfall measured in Gomīshān between 1940 and 2025 was 19 January 1964, with 10.9 cm.
Are there tropical nights in Gomīshān?
Yes: Gomīshān has on average 142 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gomīshān?
In Gomīshān, between 1940 and 2025, the highest apparent temperature reached 44.8 °C on 25 August 2008, and the lowest was -11.3 °C on 6 January 1969.
Compare Gomīshān with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gomīshān