Susa climate — normals and trends
Susa (Iran) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 24.1 °C and it receives 458 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 (37.0 °C on average) and the coldest is January (10.8 °C). Rainfall peaks in December.
Susa averages 2 frost days, 199 hot days (≥ 30 °C) and 43 rainy days per year.
Susa 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 3 to 1 per year over the period.
The hottest day of the period reached 52.1 °C (on 10 August 2022) and the coldest -6.5 °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
SusaKhuzestan
- coords
- 32.19°, 48.24°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.1°C
Average daily high
31.7°C
Average daily low
16.9°C
Annual rainfall
458mm
Sunshine / day
11.0h
Mean relative humidity
44%
Average peak wind
13.0km/h
Seasonal range
26.2°C
Frost days (< 0 °C)
2 d/yr
Hot days (≥ 30 °C)
199 d/yr
Rainy days (≥ 1 mm)
43 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.1 °C
Average feels-like low
15.1 °C
Average peak gust
26.2 km/h
Tropical nights (≥ 20 °C)
151 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 = 0.43 · 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
52.1 °C
10 August 2022
Coldest day
-6.5 °C
20 January 1964
Wettest day
119 mm
8 November 1951
Windiest day
38.0 km/h
22 February 1952
Strongest gust
82.8 km/h
23 March 2000
Hottest feels-like
53.6 °C
4 August 2022
Coldest feels-like
-10.5 °C
20 January 1964
Snowiest day
0.3 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 | 19.8 °C | +3.2 °C | 11 mm | -78 mm |
| Feb | 19.0 °C | +0.2 °C | 31 mm | -34 mm |
| Mar | 26.3 °C | +3.0 °C | 45 mm | -31 mm |
| Apr | 35.1 °C | +5.3 °C | 5 mm | -38 mm |
| May | 43.2 °C | +6.0 °C | 4 mm | -8 mm |
| Jun | 45.7 °C | +2.5 °C | 0 mm | -0 mm |
| Jul | 47.8 °C | +2.1 °C | 0 mm | -0 mm |
| Aug | 48.2 °C | +2.8 °C | 4 mm | +4 mm |
| Sep | 42.9 °C | +1.2 °C | 0 mm | -1 mm |
| Oct | 37.4 °C | +2.7 °C | 0 mm | -13 mm |
| Nov | 29.9 °C | +4.8 °C | 10 mm | -60 mm |
| Dec | 20.0 °C | +1.5 °C | 137 mm | +45 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 Susa?
Susa has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 24.1 °C and it receives 458 mm of precipitation per year.
What is the hottest day ever recorded in Susa?
The hottest day measured in Susa between 1940 and 2025 was 10 August 2022, reaching 52.1 °C.
What is the coldest day in Susa?
The coldest day measured in Susa between 1940 and 2025 was 20 January 1964, at -6.5 °C.
Does it snow in Susa?
Almost never: Susa sees virtually no snow, with about 2 frost days per year.
Has the climate of Susa warmed?
Yes: Susa warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Susa?
The wettest day measured in Susa between 1940 and 2025 was 8 November 1951, with 119 mm of rain in 24 hours.
What was the windiest day in Susa?
The windiest day measured in Susa between 1940 and 2025 was 22 February 1952, with winds reaching 38.0 km/h.
What is the warmest month in Susa?
The warmest month in Susa is July (37.0 °C on average); the coldest is January (10.8 °C).
How much does it rain in Susa?
Susa receives on average 458 mm of precipitation per year, spread over about 43 rainy days.
Is it sunny in Susa?
Susa 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 Susa?
The heaviest 24-hour snowfall measured in Susa between 1940 and 2025 was 24 January 1974, with 0.3 cm.
Are there tropical nights in Susa?
Yes: Susa has on average 151 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Susa?
In Susa, between 1940 and 2025, the highest apparent temperature reached 53.6 °C on 4 August 2022, and the lowest was -10.5 °C on 20 January 1964.
Compare Susa with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Susa