Golpāyegān climate — normals and trends
Golpāyegān (Iran) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 11.8 °C and it receives 195 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 July (26.2 °C on average) and the coldest is January (-3.5 °C). Rainfall peaks in March.
Golpāyegān averages 124 frost days, 83 hot days (≥ 30 °C) and 45 rainy days per year.
Golpāyegān has warmed by +3.2 °C between 1940 and 2025, or +0.38 °C per decade. This trend is statistically significant.
The number of frost days there went from about 144 to 104 per year over the period.
The hottest day of the period reached 39.8 °C (on 25 July 2013) and the coldest -29.1 °C (on 28 January 1983).
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
GolpāyegānIsfahan
- coords
- 33.45°, 50.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.8°C
Average daily high
18.8°C
Average daily low
4.9°C
Annual rainfall
195mm
Sunshine / day
11.0h
Mean relative humidity
44%
Average peak wind
15.3km/h
Seasonal range
29.7°C
Frost days (< 0 °C)
124 d/yr
Hot days (≥ 30 °C)
83 d/yr
Rainy days (≥ 1 mm)
45 d/yr
Annual snowfall
47.1 cm
Average feels-like high
15.7 °C
Average feels-like low
1.4 °C
Average peak gust
37.9 km/h
Tropical nights (≥ 20 °C)
10 d/yr
Solar radiation
20.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.2 °C
since 1940
+0.4 °C per decade · r² = 0.48 · 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
39.8 °C
25 July 2013
Coldest day
-29.1 °C
28 January 1983
Wettest day
39 mm
11 February 1980
Windiest day
45.0 km/h
18 April 1958
Strongest gust
105.8 km/h
31 March 2014
Hottest feels-like
38.6 °C
10 August 1970
Coldest feels-like
-34.3 °C
28 January 1983
Snowiest day
27.4 cm
11 February 1980
Sunniest day
13.4 h
19 June 1940
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 | 7.3 °C | +4.1 °C | 20 mm | -5 mm |
| Feb | 7.6 °C | +2.0 °C | 15 mm | -11 mm |
| Mar | 14.9 °C | +4.0 °C | 34 mm | -1 mm |
| Apr | 21.5 °C | +4.3 °C | 31 mm | +1 mm |
| May | 28.5 °C | +5.1 °C | 8 mm | -12 mm |
| Jun | 32.8 °C | +2.5 °C | 5 mm | +3 mm |
| Jul | 35.3 °C | +1.9 °C | 1 mm | +0 mm |
| Aug | 34.6 °C | +2.3 °C | 0 mm | -1 mm |
| Sep | 30.7 °C | +2.3 °C | 0 mm | -1 mm |
| Oct | 25.5 °C | +4.4 °C | 0 mm | -9 mm |
| Nov | 17.5 °C | +4.5 °C | 1 mm | -20 mm |
| Dec | 7.3 °C | +0.9 °C | 38 mm | +14 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 Golpāyegān?
Golpāyegān has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 11.8 °C and it receives 195 mm of precipitation per year.
What is the hottest day ever recorded in Golpāyegān?
The hottest day measured in Golpāyegān between 1940 and 2025 was 25 July 2013, reaching 39.8 °C.
What is the coldest day in Golpāyegān?
The coldest day measured in Golpāyegān between 1940 and 2025 was 28 January 1983, at -29.1 °C.
Does it snow in Golpāyegān?
Yes. Golpāyegān gets on average 47.1 cm of snow per year and has around 124 frost days.
Has the climate of Golpāyegān warmed?
Yes: Golpāyegān warmed by +3.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Golpāyegān?
The wettest day measured in Golpāyegān between 1940 and 2025 was 11 February 1980, with 39 mm of rain in 24 hours.
What was the windiest day in Golpāyegān?
The windiest day measured in Golpāyegān between 1940 and 2025 was 18 April 1958, with winds reaching 45.0 km/h.
What is the warmest month in Golpāyegān?
The warmest month in Golpāyegān is July (26.2 °C on average); the coldest is January (-3.5 °C).
How much does it rain in Golpāyegān?
Golpāyegān receives on average 195 mm of precipitation per year, spread over about 45 rainy days.
Is it sunny in Golpāyegān?
Golpāyegān gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
What is the biggest single-day snowfall in Golpāyegān?
The heaviest 24-hour snowfall measured in Golpāyegān between 1940 and 2025 was 11 February 1980, with 27.4 cm.
Are there tropical nights in Golpāyegān?
Yes: Golpāyegān has on average 10 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Golpāyegān?
In Golpāyegān, between 1940 and 2025, the highest apparent temperature reached 38.6 °C on 10 August 1970, and the lowest was -34.3 °C on 28 January 1983.
Compare Golpāyegān with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Golpāyegān