Gachsaran climate — normals and trends
Gachsaran (Iran) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 22.2 °C and it receives 469 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 (34.1 °C on average) and the coldest is January (9.5 °C). Rainfall peaks in January.
Gachsaran averages 4 frost days, 184 hot days (≥ 30 °C) and 43 rainy days per year.
Gachsaran has warmed by +1.9 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The hottest day of the period reached 47.0 °C (on 17 July 2014) and the coldest -9.9 °C (on 20 January 1964).
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
GachsaranKohgiluyeh and Boyer-Ahmad
- coords
- 30.36°, 50.80°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
22.2°C
Average daily high
29.0°C
Average daily low
15.3°C
Annual rainfall
469mm
Sunshine / day
11.0h
Mean relative humidity
41%
Average peak wind
15.8km/h
Seasonal range
24.6°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
184 d/yr
Rainy days (≥ 1 mm)
43 d/yr
Annual snowfall
1.1 cm
Average feels-like high
27.3 °C
Average feels-like low
12.5 °C
Average peak gust
34.5 km/h
Tropical nights (≥ 20 °C)
131 d/yr
Solar radiation
20.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.43 · 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
47.0 °C
17 July 2014
Coldest day
-9.9 °C
20 January 1964
Wettest day
131 mm
29 November 1957
Windiest day
34.8 km/h
3 June 1941
Strongest gust
82.8 km/h
25 March 2019
Hottest feels-like
47.4 °C
1 July 2000
Coldest feels-like
-14.4 °C
20 January 1964
Snowiest day
4.0 cm
13 January 1998
Sunniest day
13.0 h
25 April 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 | 18.5 °C | +3.3 °C | 11 mm | -103 mm |
| Feb | 17.5 °C | +0.5 °C | 47 mm | -23 mm |
| Mar | 23.2 °C | +2.0 °C | 76 mm | +9 mm |
| Apr | 33.0 °C | +5.4 °C | 2 mm | -26 mm |
| May | 39.4 °C | +4.6 °C | 0 mm | -7 mm |
| Jun | 41.3 °C | +1.5 °C | 0 mm | -0 mm |
| Jul | 43.1 °C | +1.8 °C | 1 mm | 0 mm |
| Aug | 42.7 °C | +1.9 °C | 2 mm | 0 mm |
| Sep | 39.5 °C | +1.7 °C | 0 mm | -1 mm |
| Oct | 34.4 °C | +2.4 °C | 0 mm | -5 mm |
| Nov | 28.1 °C | +4.6 °C | 0 mm | -59 mm |
| Dec | 18.7 °C | +1.3 °C | 204 mm | +90 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 Gachsaran?
Gachsaran has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 22.2 °C and it receives 469 mm of precipitation per year.
What is the hottest day ever recorded in Gachsaran?
The hottest day measured in Gachsaran between 1940 and 2025 was 17 July 2014, reaching 47.0 °C.
What is the coldest day in Gachsaran?
The coldest day measured in Gachsaran between 1940 and 2025 was 20 January 1964, at -9.9 °C.
Does it snow in Gachsaran?
Yes. Gachsaran gets on average 1.1 cm of snow per year and has around 4 frost days.
Has the climate of Gachsaran warmed?
Yes: Gachsaran warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gachsaran?
The wettest day measured in Gachsaran between 1940 and 2025 was 29 November 1957, with 131 mm of rain in 24 hours.
What was the windiest day in Gachsaran?
The windiest day measured in Gachsaran between 1940 and 2025 was 3 June 1941, with winds reaching 34.8 km/h.
What is the warmest month in Gachsaran?
The warmest month in Gachsaran is July (34.1 °C on average); the coldest is January (9.5 °C).
How much does it rain in Gachsaran?
Gachsaran receives on average 469 mm of precipitation per year, spread over about 43 rainy days.
Is it sunny in Gachsaran?
Gachsaran 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 Gachsaran?
The heaviest 24-hour snowfall measured in Gachsaran between 1940 and 2025 was 13 January 1998, with 4.0 cm.
Are there tropical nights in Gachsaran?
Yes: Gachsaran has on average 131 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gachsaran?
In Gachsaran, between 1940 and 2025, the highest apparent temperature reached 47.4 °C on 1 July 2000, and the lowest was -14.4 °C on 20 January 1964.
Compare Gachsaran with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gachsaran