Dehdasht climate — normals and trends
Dehdasht (Iran) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 20.9 °C and it receives 528 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 (32.9 °C on average) and the coldest is January (8.3 °C). Rainfall peaks in January.
Dehdasht averages 14 frost days, 172 hot days (≥ 30 °C) and 43 rainy days per year.
Dehdasht has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 18 to 10 per year over the period.
The hottest day of the period reached 46.3 °C (on 10 July 2018) and the coldest -15.2 °C (on 29 January 1950).
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
DehdashtKohgiluyeh and Boyer-Ahmad
- coords
- 30.79°, 50.57°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
20.9°C
Average daily high
28.0°C
Average daily low
13.4°C
Annual rainfall
528mm
Sunshine / day
10.9h
Mean relative humidity
42%
Average peak wind
11.9km/h
Seasonal range
24.6°C
Frost days (< 0 °C)
14 d/yr
Hot days (≥ 30 °C)
172 d/yr
Rainy days (≥ 1 mm)
43 d/yr
Annual snowfall
0.7 cm
Average feels-like high
26.5 °C
Average feels-like low
11.0 °C
Average peak gust
29.5 km/h
Tropical nights (≥ 20 °C)
97 d/yr
Solar radiation
20.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.44 · 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
46.3 °C
10 July 2018
Coldest day
-15.2 °C
29 January 1950
Wettest day
108 mm
28 November 1953
Windiest day
32.3 km/h
26 February 1985
Strongest gust
79.9 km/h
12 March 1994
Hottest feels-like
46.9 °C
15 July 1967
Coldest feels-like
-20.1 °C
29 January 1950
Snowiest day
7.5 cm
13 January 1998
Sunniest day
13.0 h
22 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 16.9 °C | +2.6 °C | 9 mm | -123 mm |
| Feb | 16.4 °C | +0.3 °C | 57 mm | -31 mm |
| Mar | 21.7 °C | +1.8 °C | 87 mm | +2 mm |
| Apr | 31.0 °C | +5.1 °C | 4 mm | -28 mm |
| May | 38.5 °C | +5.2 °C | 0 mm | -7 mm |
| Jun | 40.2 °C | +1.3 °C | 0 mm | -0 mm |
| Jul | 42.3 °C | +1.6 °C | 0 mm | -0 mm |
| Aug | 42.8 °C | +2.6 °C | 0 mm | -0 mm |
| Sep | 38.5 °C | +1.5 °C | 0 mm | -0 mm |
| Oct | 33.4 °C | +2.6 °C | 0 mm | -4 mm |
| Nov | 27.1 °C | +4.8 °C | 0 mm | -60 mm |
| Dec | 17.4 °C | +0.9 °C | 176 mm | +57 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 Dehdasht?
Dehdasht has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 20.9 °C and it receives 528 mm of precipitation per year.
What is the hottest day ever recorded in Dehdasht?
The hottest day measured in Dehdasht between 1940 and 2025 was 10 July 2018, reaching 46.3 °C.
What is the coldest day in Dehdasht?
The coldest day measured in Dehdasht between 1940 and 2025 was 29 January 1950, at -15.2 °C.
Does it snow in Dehdasht?
Almost never: Dehdasht sees virtually no snow, with about 14 frost days per year.
Has the climate of Dehdasht warmed?
Yes: Dehdasht warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Dehdasht?
The wettest day measured in Dehdasht between 1940 and 2025 was 28 November 1953, with 108 mm of rain in 24 hours.
What was the windiest day in Dehdasht?
The windiest day measured in Dehdasht between 1940 and 2025 was 26 February 1985, with winds reaching 32.3 km/h.
What is the warmest month in Dehdasht?
The warmest month in Dehdasht is July (32.9 °C on average); the coldest is January (8.3 °C).
How much does it rain in Dehdasht?
Dehdasht receives on average 528 mm of precipitation per year, spread over about 43 rainy days.
Is it sunny in Dehdasht?
Dehdasht gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
What is the biggest single-day snowfall in Dehdasht?
The heaviest 24-hour snowfall measured in Dehdasht between 1940 and 2025 was 13 January 1998, with 7.5 cm.
Are there tropical nights in Dehdasht?
Yes: Dehdasht has on average 97 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Dehdasht?
In Dehdasht, between 1940 and 2025, the highest apparent temperature reached 46.9 °C on 15 July 1967, and the lowest was -20.1 °C on 29 January 1950.
Compare Dehdasht with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Dehdasht