Khorramshahr climate — normals and trends
Khorramshahr (Iran) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 26.5 °C and it receives 163 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 (38.7 °C on average) and the coldest is January (12.7 °C). Rainfall peaks in December.
Khorramshahr averages 0 frost days, 217 hot days (≥ 30 °C) and 24 rainy days per year.
Khorramshahr has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The hottest day of the period reached 52.2 °C (on 30 July 2020) and the coldest -4.1 °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
KhorramshahrKhuzestan
- coords
- 30.44°, 48.18°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.5°C
Average daily high
33.3°C
Average daily low
20.0°C
Annual rainfall
163mm
Sunshine / day
11.0h
Mean relative humidity
39%
Average peak wind
22.7km/h
Seasonal range
26.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
217 d/yr
Rainy days (≥ 1 mm)
24 d/yr
Annual snowfall
0.0 cm
Average feels-like high
30.7 °C
Average feels-like low
17.7 °C
Average peak gust
37.2 km/h
Tropical nights (≥ 20 °C)
190 d/yr
Solar radiation
20.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.47 · 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
52.2 °C
30 July 2020
Coldest day
-4.1 °C
20 January 1964
Wettest day
92 mm
19 November 2013
Windiest day
61.3 km/h
16 February 1949
Strongest gust
92.5 km/h
8 March 1979
Hottest feels-like
54.0 °C
19 August 2024
Coldest feels-like
-10.2 °C
20 January 1964
Sunniest day
13.3 h
20 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 | 21.1 °C | +2.9 °C | 13 mm | -19 mm |
| Feb | 20.8 °C | -0.4 °C | 9 mm | -12 mm |
| Mar | 27.1 °C | +0.9 °C | 42 mm | +18 mm |
| Apr | 36.1 °C | +3.1 °C | 1 mm | -10 mm |
| May | 43.8 °C | +3.8 °C | 0 mm | -4 mm |
| Jun | 45.9 °C | +1.2 °C | 0 mm | -0 mm |
| Jul | 47.7 °C | +1.6 °C | 0 mm | -0 mm |
| Aug | 47.4 °C | +1.7 °C | 2 mm | +2 mm |
| Sep | 43.4 °C | +0.9 °C | 0 mm | -0 mm |
| Oct | 37.6 °C | +1.7 °C | 0 mm | -4 mm |
| Nov | 30.0 °C | +3.5 °C | 1 mm | -31 mm |
| Dec | 21.0 °C | +1.1 °C | 47 mm | +13 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 Khorramshahr?
Khorramshahr has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 26.5 °C and it receives 163 mm of precipitation per year.
What is the hottest day ever recorded in Khorramshahr?
The hottest day measured in Khorramshahr between 1940 and 2025 was 30 July 2020, reaching 52.2 °C.
What is the coldest day in Khorramshahr?
The coldest day measured in Khorramshahr between 1940 and 2025 was 20 January 1964, at -4.1 °C.
Does it snow in Khorramshahr?
Almost never: Khorramshahr sees virtually no snow, with about 0 frost days per year.
Has the climate of Khorramshahr warmed?
Yes: Khorramshahr warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Khorramshahr?
The wettest day measured in Khorramshahr between 1940 and 2025 was 19 November 2013, with 92 mm of rain in 24 hours.
What was the windiest day in Khorramshahr?
The windiest day measured in Khorramshahr between 1940 and 2025 was 16 February 1949, with winds reaching 61.3 km/h.
What is the warmest month in Khorramshahr?
The warmest month in Khorramshahr is July (38.7 °C on average); the coldest is January (12.7 °C).
How much does it rain in Khorramshahr?
Khorramshahr receives on average 163 mm of precipitation per year, spread over about 24 rainy days.
Is it sunny in Khorramshahr?
Khorramshahr gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
Are there tropical nights in Khorramshahr?
Yes: Khorramshahr has on average 190 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Khorramshahr?
In Khorramshahr, between 1940 and 2025, the highest apparent temperature reached 54.0 °C on 19 August 2024, and the lowest was -10.2 °C on 20 January 1964.
Compare Khorramshahr with another city
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Nearby cities
The climate around Khorramshahr