Behbahān climate — normals and trends
Behbahān (Iran) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 24.3 °C and it receives 490 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 (36.3 °C on average) and the coldest is January (11.4 °C). Rainfall peaks in December.
Behbahān averages 1 frost days, 203 hot days (≥ 30 °C) and 42 rainy days per year.
Behbahān has warmed by +2.1 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The hottest day of the period reached 49.7 °C (on 1 July 2000) and the coldest -6.2 °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
BehbahānKhuzestan
- coords
- 30.60°, 50.24°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.3°C
Average daily high
31.3°C
Average daily low
17.2°C
Annual rainfall
490mm
Sunshine / day
10.9h
Mean relative humidity
41%
Average peak wind
16.9km/h
Seasonal range
24.9°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
203 d/yr
Rainy days (≥ 1 mm)
42 d/yr
Annual snowfall
0.0 cm
Average feels-like high
29.6 °C
Average feels-like low
15.0 °C
Average peak gust
31.5 km/h
Tropical nights (≥ 20 °C)
154 d/yr
Solar radiation
20.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.2 °C per decade · r² = 0.46 · 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
49.7 °C
1 July 2000
Coldest day
-6.2 °C
20 January 1964
Wettest day
153 mm
9 December 2004
Windiest day
43.5 km/h
26 February 1985
Strongest gust
79.6 km/h
13 April 1952
Hottest feels-like
50.9 °C
9 August 2022
Coldest feels-like
-10.4 °C
20 January 1964
Snowiest day
0.4 cm
19 January 1964
Sunniest day
13.0 h
17 June 2025
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 | 20.7 °C | +3.8 °C | 9 mm | -105 mm |
| Feb | 19.7 °C | +0.8 °C | 37 mm | -33 mm |
| Mar | 25.9 °C | +2.4 °C | 69 mm | +1 mm |
| Apr | 35.6 °C | +5.4 °C | 3 mm | -27 mm |
| May | 42.4 °C | +4.8 °C | 0 mm | -8 mm |
| Jun | 43.9 °C | +1.4 °C | 0 mm | -0 mm |
| Jul | 45.7 °C | +1.7 °C | 1 mm | +1 mm |
| Aug | 45.6 °C | +2.1 °C | 1 mm | -0 mm |
| Sep | 42.0 °C | +1.7 °C | 0 mm | -1 mm |
| Oct | 36.8 °C | +2.4 °C | 0 mm | -6 mm |
| Nov | 30.1 °C | +4.7 °C | 0 mm | -70 mm |
| Dec | 20.6 °C | +1.7 °C | 233 mm | +110 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 Behbahān?
Behbahān has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 24.3 °C and it receives 490 mm of precipitation per year.
What is the hottest day ever recorded in Behbahān?
The hottest day measured in Behbahān between 1940 and 2025 was 1 July 2000, reaching 49.7 °C.
What is the coldest day in Behbahān?
The coldest day measured in Behbahān between 1940 and 2025 was 20 January 1964, at -6.2 °C.
Does it snow in Behbahān?
Almost never: Behbahān sees virtually no snow, with about 1 frost days per year.
Has the climate of Behbahān warmed?
Yes: Behbahān warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Behbahān?
The wettest day measured in Behbahān between 1940 and 2025 was 9 December 2004, with 153 mm of rain in 24 hours.
What was the windiest day in Behbahān?
The windiest day measured in Behbahān between 1940 and 2025 was 26 February 1985, with winds reaching 43.5 km/h.
What is the warmest month in Behbahān?
The warmest month in Behbahān is July (36.3 °C on average); the coldest is January (11.4 °C).
How much does it rain in Behbahān?
Behbahān receives on average 490 mm of precipitation per year, spread over about 42 rainy days.
Is it sunny in Behbahān?
Behbahān 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 Behbahān?
The heaviest 24-hour snowfall measured in Behbahān between 1940 and 2025 was 19 January 1964, with 0.4 cm.
Are there tropical nights in Behbahān?
Yes: Behbahān has on average 154 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Behbahān?
In Behbahān, between 1940 and 2025, the highest apparent temperature reached 50.9 °C on 9 August 2022, and the lowest was -10.4 °C on 20 January 1964.
Compare Behbahān with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Behbahān