Rūdehen climate — normals and trends
Rūdehen (Iran) has a hot-summer mediterranean continental climate (Dsa) under the Köppen-Geiger classification. Its mean annual temperature is 8.2 °C and it receives 348 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 (22.3 °C on average) and the coldest is January (-6.0 °C). Rainfall peaks in March.
Rūdehen averages 136 frost days, 4 hot days (≥ 30 °C) and 72 rainy days per year.
Rūdehen has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 153 to 119 per year over the period.
The hottest day of the period reached 33.4 °C (on 8 August 2024) and the coldest -25.4 °C (on 21 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
RūdehenTehran
- coords
- 35.73°, 51.91°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.2°C
Average daily high
12.1°C
Average daily low
4.1°C
Annual rainfall
348mm
Sunshine / day
10.8h
Mean relative humidity
50%
Average peak wind
9.8km/h
Seasonal range
28.3°C
Frost days (< 0 °C)
136 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
72 d/yr
Annual snowfall
128.6 cm
Average feels-like high
9.4 °C
Average feels-like low
0.9 °C
Average peak gust
38.3 km/h
Tropical nights (≥ 20 °C)
8 d/yr
Solar radiation
19.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.41 · 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
33.4 °C
8 August 2024
Coldest day
-25.4 °C
21 January 1964
Wettest day
44 mm
7 May 1949
Windiest day
25.5 km/h
9 May 2000
Strongest gust
119.2 km/h
21 February 1985
Hottest feels-like
30.9 °C
21 July 2025
Coldest feels-like
-30.8 °C
21 January 1964
Snowiest day
21.6 cm
7 May 1949
Sunniest day
13.4 h
25 June 1941
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 | 1.4 °C | +4.0 °C | 15 mm | -20 mm |
| Feb | -1.2 °C | +0.1 °C | 38 mm | -4 mm |
| Mar | 7.8 °C | +4.7 °C | 46 mm | -14 mm |
| Apr | 15.2 °C | +5.1 °C | 36 mm | -17 mm |
| May | 22.1 °C | +5.1 °C | 16 mm | -20 mm |
| Jun | 24.7 °C | +1.1 °C | 5 mm | -6 mm |
| Jul | 28.4 °C | +1.6 °C | 11 mm | +3 mm |
| Aug | 27.9 °C | +2.4 °C | 3 mm | -6 mm |
| Sep | 22.8 °C | +1.3 °C | 2 mm | -5 mm |
| Oct | 18.3 °C | +3.9 °C | 0 mm | -21 mm |
| Nov | 11.5 °C | +5.0 °C | 1 mm | -33 mm |
| Dec | 2.8 °C | +2.6 °C | 37 mm | +3 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 Rūdehen?
Rūdehen has a hot-summer mediterranean continental climate (Köppen Dsa). Over 1940-2025, the average annual temperature is 8.2 °C and it receives 348 mm of precipitation per year.
What is the hottest day ever recorded in Rūdehen?
The hottest day measured in Rūdehen between 1940 and 2025 was 8 August 2024, reaching 33.4 °C.
What is the coldest day in Rūdehen?
The coldest day measured in Rūdehen between 1940 and 2025 was 21 January 1964, at -25.4 °C.
Does it snow in Rūdehen?
Yes. Rūdehen gets on average 128.6 cm of snow per year and has around 136 frost days.
Has the climate of Rūdehen warmed?
Yes: Rūdehen warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rūdehen?
The wettest day measured in Rūdehen between 1940 and 2025 was 7 May 1949, with 44 mm of rain in 24 hours.
What was the windiest day in Rūdehen?
The windiest day measured in Rūdehen between 1940 and 2025 was 9 May 2000, with winds reaching 25.5 km/h.
What is the warmest month in Rūdehen?
The warmest month in Rūdehen is July (22.3 °C on average); the coldest is January (-6.0 °C).
How much does it rain in Rūdehen?
Rūdehen receives on average 348 mm of precipitation per year, spread over about 72 rainy days.
Is it sunny in Rūdehen?
Rūdehen gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
What is the biggest single-day snowfall in Rūdehen?
The heaviest 24-hour snowfall measured in Rūdehen between 1940 and 2025 was 7 May 1949, with 21.6 cm.
Are there tropical nights in Rūdehen?
Yes: Rūdehen has on average 8 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rūdehen?
In Rūdehen, between 1940 and 2025, the highest apparent temperature reached 30.9 °C on 21 July 2025, and the lowest was -30.8 °C on 21 January 1964.
Compare Rūdehen with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rūdehen