Dezful climate — normals and trends
Dezful (Iran) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 23.5 °C and it receives 631 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 (36.7 °C on average) and the coldest is January (10.2 °C). Rainfall peaks in January.
Dezful averages 4 frost days, 190 hot days (≥ 30 °C) and 49 rainy days per year.
Dezful has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 6 to 2 per year over the period.
The hottest day of the period reached 50.8 °C (on 9 July 2011) and the coldest -8.1 °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
DezfulKhuzestan
- coords
- 32.38°, 48.41°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.5°C
Average daily high
30.5°C
Average daily low
16.3°C
Annual rainfall
631mm
Sunshine / day
10.9h
Mean relative humidity
42%
Average peak wind
11.7km/h
Seasonal range
26.5°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
190 d/yr
Rainy days (≥ 1 mm)
49 d/yr
Annual snowfall
0.2 cm
Average feels-like high
29.4 °C
Average feels-like low
14.3 °C
Average peak gust
26.2 km/h
Tropical nights (≥ 20 °C)
145 d/yr
Solar radiation
20.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.52 · 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
50.8 °C
9 July 2011
Coldest day
-8.1 °C
20 January 1964
Wettest day
114 mm
7 November 1994
Windiest day
34.3 km/h
7 March 1994
Strongest gust
83.9 km/h
18 December 1985
Hottest feels-like
51.1 °C
27 July 2011
Coldest feels-like
-12.5 °C
20 January 1964
Snowiest day
3.3 cm
24 January 1974
Sunniest day
13.6 h
26 June 1945
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 | 18.4 °C | +2.8 °C | 13 mm | -115 mm |
| Feb | 17.5 °C | 0.0 °C | 54 mm | -40 mm |
| Mar | 24.2 °C | +2.5 °C | 76 mm | -29 mm |
| Apr | 33.4 °C | +5.1 °C | 7 mm | -50 mm |
| May | 42.1 °C | +5.9 °C | 3 mm | -10 mm |
| Jun | 44.3 °C | +1.8 °C | 0 mm | -0 mm |
| Jul | 46.7 °C | +2.0 °C | 0 mm | -0 mm |
| Aug | 47.2 °C | +2.9 °C | 2 mm | +1 mm |
| Sep | 41.9 °C | +1.3 °C | 0 mm | -1 mm |
| Oct | 36.7 °C | +3.1 °C | 0 mm | -16 mm |
| Nov | 29.1 °C | +5.2 °C | 15 mm | -74 mm |
| Dec | 19.0 °C | +1.4 °C | 193 mm | +65 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 Dezful?
Dezful has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 23.5 °C and it receives 631 mm of precipitation per year.
What is the hottest day ever recorded in Dezful?
The hottest day measured in Dezful between 1940 and 2025 was 9 July 2011, reaching 50.8 °C.
What is the coldest day in Dezful?
The coldest day measured in Dezful between 1940 and 2025 was 20 January 1964, at -8.1 °C.
Does it snow in Dezful?
Almost never: Dezful sees virtually no snow, with about 4 frost days per year.
Has the climate of Dezful warmed?
Yes: Dezful warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Dezful?
The wettest day measured in Dezful between 1940 and 2025 was 7 November 1994, with 114 mm of rain in 24 hours.
What was the windiest day in Dezful?
The windiest day measured in Dezful between 1940 and 2025 was 7 March 1994, with winds reaching 34.3 km/h.
What is the warmest month in Dezful?
The warmest month in Dezful is July (36.7 °C on average); the coldest is January (10.2 °C).
How much does it rain in Dezful?
Dezful receives on average 631 mm of precipitation per year, spread over about 49 rainy days.
Is it sunny in Dezful?
Dezful 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 Dezful?
The heaviest 24-hour snowfall measured in Dezful between 1940 and 2025 was 24 January 1974, with 3.3 cm.
Are there tropical nights in Dezful?
Yes: Dezful has on average 145 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Dezful?
In Dezful, between 1940 and 2025, the highest apparent temperature reached 51.1 °C on 27 July 2011, and the lowest was -12.5 °C on 20 January 1964.
Compare Dezful with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Dezful