Īlām climate — normals and trends
Īlām (Iran) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 14.4 °C and it receives 522 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 (27.2 °C on average) and the coldest is January (1.5 °C). Rainfall peaks in March.
Īlām averages 73 frost days, 106 hot days (≥ 30 °C) and 67 rainy days per year.
Īlām has warmed by +2.6 °C between 1940 and 2025, or +0.31 °C per decade. This trend is statistically significant.
The number of frost days there went from about 93 to 53 per year over the period.
The hottest day of the period reached 41.1 °C (on 17 July 1942) and the coldest -29.0 °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
ĪlāmIlam Province
- coords
- 33.64°, 46.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.4°C
Average daily high
21.1°C
Average daily low
7.7°C
Annual rainfall
522mm
Sunshine / day
11.0h
Mean relative humidity
51%
Average peak wind
11.8km/h
Seasonal range
25.7°C
Frost days (< 0 °C)
73 d/yr
Hot days (≥ 30 °C)
106 d/yr
Rainy days (≥ 1 mm)
67 d/yr
Annual snowfall
50.7 cm
Average feels-like high
19.3 °C
Average feels-like low
5.0 °C
Average peak gust
35.2 km/h
Tropical nights (≥ 20 °C)
16 d/yr
Solar radiation
20.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °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
41.1 °C
17 July 1942
Coldest day
-29.0 °C
20 January 1964
Wettest day
82 mm
3 February 2006
Windiest day
31.2 km/h
28 April 1979
Strongest gust
107.6 km/h
25 November 1992
Hottest feels-like
41.9 °C
27 July 2011
Coldest feels-like
-34.2 °C
20 January 1964
Snowiest day
25.3 cm
26 January 2001
Sunniest day
14.0 h
5 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 | 9.1 °C | +2.3 °C | 24 mm | -57 mm |
| Feb | 7.4 °C | -1.2 °C | 62 mm | -20 mm |
| Mar | 15.3 °C | +2.5 °C | 92 mm | -8 mm |
| Apr | 21.1 °C | +2.5 °C | 80 mm | +14 mm |
| May | 29.4 °C | +4.4 °C | 15 mm | -10 mm |
| Jun | 33.5 °C | +1.9 °C | 1 mm | +0 mm |
| Jul | 36.4 °C | +1.2 °C | 0 mm | 0 mm |
| Aug | 38.0 °C | +3.1 °C | 0 mm | 0 mm |
| Sep | 31.7 °C | +0.8 °C | 0 mm | -1 mm |
| Oct | 26.5 °C | +2.7 °C | 0 mm | -22 mm |
| Nov | 19.2 °C | +3.9 °C | 17 mm | -47 mm |
| Dec | 9.9 °C | +0.5 °C | 122 mm | +44 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 Īlām?
Īlām has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 14.4 °C and it receives 522 mm of precipitation per year.
What is the hottest day ever recorded in Īlām?
The hottest day measured in Īlām between 1940 and 2025 was 17 July 1942, reaching 41.1 °C.
What is the coldest day in Īlām?
The coldest day measured in Īlām between 1940 and 2025 was 20 January 1964, at -29.0 °C.
Does it snow in Īlām?
Yes. Īlām gets on average 50.7 cm of snow per year and has around 73 frost days.
Has the climate of Īlām warmed?
Yes: Īlām warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Īlām?
The wettest day measured in Īlām between 1940 and 2025 was 3 February 2006, with 82 mm of rain in 24 hours.
What was the windiest day in Īlām?
The windiest day measured in Īlām between 1940 and 2025 was 28 April 1979, with winds reaching 31.2 km/h.
What is the warmest month in Īlām?
The warmest month in Īlām is July (27.2 °C on average); the coldest is January (1.5 °C).
How much does it rain in Īlām?
Īlām receives on average 522 mm of precipitation per year, spread over about 67 rainy days.
Is it sunny in Īlām?
Īlām 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 Īlām?
The heaviest 24-hour snowfall measured in Īlām between 1940 and 2025 was 26 January 2001, with 25.3 cm.
Are there tropical nights in Īlām?
Yes: Īlām has on average 16 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Īlām?
In Īlām, between 1940 and 2025, the highest apparent temperature reached 41.9 °C on 27 July 2011, and the lowest was -34.2 °C on 20 January 1964.
Compare Īlām with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Īlām