Eyvān climate — normals and trends
Eyvān (Iran) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 16.0 °C and it receives 530 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 (29.1 °C on average) and the coldest is January (2.9 °C). Rainfall peaks in March.
Eyvān averages 54 frost days, 122 hot days (≥ 30 °C) and 64 rainy days per year.
Eyvān has warmed by +2.5 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The number of frost days there went from about 70 to 38 per year over the period.
The hottest day of the period reached 42.2 °C (on 12 July 2010) and the coldest -25.0 °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
EyvānIlam Province
- coords
- 33.83°, 46.31°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.0°C
Average daily high
22.4°C
Average daily low
9.6°C
Annual rainfall
530mm
Sunshine / day
11.0h
Mean relative humidity
48%
Average peak wind
13.9km/h
Seasonal range
26.2°C
Frost days (< 0 °C)
54 d/yr
Hot days (≥ 30 °C)
122 d/yr
Rainy days (≥ 1 mm)
64 d/yr
Annual snowfall
33.0 cm
Average feels-like high
20.2 °C
Average feels-like low
6.8 °C
Average peak gust
38.5 km/h
Tropical nights (≥ 20 °C)
44 d/yr
Solar radiation
20.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °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
42.2 °C
12 July 2010
Coldest day
-25.0 °C
20 January 1964
Wettest day
84 mm
3 February 2006
Windiest day
34.9 km/h
25 November 1992
Strongest gust
113.4 km/h
25 November 1992
Hottest feels-like
43.2 °C
27 July 2011
Coldest feels-like
-30.5 °C
20 January 1964
Snowiest day
23.7 cm
26 January 2001
Sunniest day
14.0 h
3 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 | 10.3 °C | +2.2 °C | 27 mm | -61 mm |
| Feb | 8.3 °C | -1.5 °C | 63 mm | -21 mm |
| Mar | 16.1 °C | +2.2 °C | 93 mm | -8 mm |
| Apr | 22.5 °C | +2.7 °C | 68 mm | +4 mm |
| May | 31.1 °C | +4.4 °C | 13 mm | -10 mm |
| Jun | 34.8 °C | +1.8 °C | 0 mm | -0 mm |
| Jul | 37.4 °C | +1.1 °C | 0 mm | 0 mm |
| Aug | 38.6 °C | +2.5 °C | 0 mm | +0 mm |
| Sep | 32.4 °C | +0.2 °C | 0 mm | -1 mm |
| Oct | 27.6 °C | +2.4 °C | 0 mm | -20 mm |
| Nov | 20.8 °C | +4.3 °C | 14 mm | -52 mm |
| Dec | 11.1 °C | +0.4 °C | 152 mm | +69 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 Eyvān?
Eyvān has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 16.0 °C and it receives 530 mm of precipitation per year.
What is the hottest day ever recorded in Eyvān?
The hottest day measured in Eyvān between 1940 and 2025 was 12 July 2010, reaching 42.2 °C.
What is the coldest day in Eyvān?
The coldest day measured in Eyvān between 1940 and 2025 was 20 January 1964, at -25.0 °C.
Does it snow in Eyvān?
Yes. Eyvān gets on average 33.0 cm of snow per year and has around 54 frost days.
Has the climate of Eyvān warmed?
Yes: Eyvān warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Eyvān?
The wettest day measured in Eyvān between 1940 and 2025 was 3 February 2006, with 84 mm of rain in 24 hours.
What was the windiest day in Eyvān?
The windiest day measured in Eyvān between 1940 and 2025 was 25 November 1992, with winds reaching 34.9 km/h.
What is the warmest month in Eyvān?
The warmest month in Eyvān is July (29.1 °C on average); the coldest is January (2.9 °C).
How much does it rain in Eyvān?
Eyvān receives on average 530 mm of precipitation per year, spread over about 64 rainy days.
Is it sunny in Eyvān?
Eyvān 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 Eyvān?
The heaviest 24-hour snowfall measured in Eyvān between 1940 and 2025 was 26 January 2001, with 23.7 cm.
Are there tropical nights in Eyvān?
Yes: Eyvān has on average 44 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Eyvān?
In Eyvān, between 1940 and 2025, the highest apparent temperature reached 43.2 °C on 27 July 2011, and the lowest was -30.5 °C on 20 January 1964.
Compare Eyvān with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Eyvān