Hamadan climate — normals and trends
Hamadan (Iran) has a hot-summer mediterranean continental climate (Dsa) under the Köppen-Geiger classification. Its mean annual temperature is 10.9 °C and it receives 404 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 (25.4 °C on average) and the coldest is January (-3.7 °C). Rainfall peaks in March.
Hamadan averages 116 frost days, 69 hot days (≥ 30 °C) and 78 rainy days per year.
Hamadan has warmed by +3.4 °C between 1940 and 2025, or +0.39 °C per decade. This trend is statistically significant.
The number of frost days there went from about 138 to 94 per year over the period.
The hottest day of the period reached 39.1 °C (on 8 July 2010) and the coldest -25.1 °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
HamadanHamadan Province
- coords
- 34.80°, 48.51°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.9°C
Average daily high
16.9°C
Average daily low
5.4°C
Annual rainfall
404mm
Sunshine / day
11.0h
Mean relative humidity
48%
Average peak wind
13.7km/h
Seasonal range
29.1°C
Frost days (< 0 °C)
116 d/yr
Hot days (≥ 30 °C)
69 d/yr
Rainy days (≥ 1 mm)
78 d/yr
Annual snowfall
110.8 cm
Average feels-like high
14.0 °C
Average feels-like low
2.2 °C
Average peak gust
40.0 km/h
Tropical nights (≥ 20 °C)
9 d/yr
Solar radiation
20.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.4 °C
since 1940
+0.4 °C per decade · r² = 0.53 · 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
39.1 °C
8 July 2010
Coldest day
-25.1 °C
20 January 1964
Wettest day
55 mm
25 February 2020
Windiest day
47.4 km/h
7 April 1964
Strongest gust
121.3 km/h
7 April 1964
Hottest feels-like
37.3 °C
12 July 2010
Coldest feels-like
-29.3 °C
20 January 1964
Snowiest day
20.5 cm
18 December 1985
Sunniest day
14.0 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 | 4.6 °C | +3.9 °C | 29 mm | -16 mm |
| Feb | 1.7 °C | -0.8 °C | 67 mm | +16 mm |
| Mar | 11.6 °C | +3.7 °C | 81 mm | +6 mm |
| Apr | 18.7 °C | +3.9 °C | 51 mm | -20 mm |
| May | 26.4 °C | +5.4 °C | 23 mm | -19 mm |
| Jun | 30.9 °C | +2.4 °C | 2 mm | -3 mm |
| Jul | 34.4 °C | +1.7 °C | 7 mm | +5 mm |
| Aug | 35.0 °C | +3.0 °C | 0 mm | -1 mm |
| Sep | 28.8 °C | +1.3 °C | 0 mm | -2 mm |
| Oct | 23.6 °C | +3.8 °C | 0 mm | -21 mm |
| Nov | 16.3 °C | +5.1 °C | 1 mm | -41 mm |
| Dec | 6.4 °C | +2.2 °C | 61 mm | +15 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 Hamadan?
Hamadan has a hot-summer mediterranean continental climate (Köppen Dsa). Over 1940-2025, the average annual temperature is 10.9 °C and it receives 404 mm of precipitation per year.
What is the hottest day ever recorded in Hamadan?
The hottest day measured in Hamadan between 1940 and 2025 was 8 July 2010, reaching 39.1 °C.
What is the coldest day in Hamadan?
The coldest day measured in Hamadan between 1940 and 2025 was 20 January 1964, at -25.1 °C.
Does it snow in Hamadan?
Yes. Hamadan gets on average 110.8 cm of snow per year and has around 116 frost days.
Has the climate of Hamadan warmed?
Yes: Hamadan warmed by +3.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hamadan?
The wettest day measured in Hamadan between 1940 and 2025 was 25 February 2020, with 55 mm of rain in 24 hours.
What was the windiest day in Hamadan?
The windiest day measured in Hamadan between 1940 and 2025 was 7 April 1964, with winds reaching 47.4 km/h.
What is the warmest month in Hamadan?
The warmest month in Hamadan is July (25.4 °C on average); the coldest is January (-3.7 °C).
How much does it rain in Hamadan?
Hamadan receives on average 404 mm of precipitation per year, spread over about 78 rainy days.
Is it sunny in Hamadan?
Hamadan 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 Hamadan?
The heaviest 24-hour snowfall measured in Hamadan between 1940 and 2025 was 18 December 1985, with 20.5 cm.
Are there tropical nights in Hamadan?
Yes: Hamadan has on average 9 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hamadan?
In Hamadan, between 1940 and 2025, the highest apparent temperature reached 37.3 °C on 12 July 2010, and the lowest was -29.3 °C on 20 January 1964.
Compare Hamadan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hamadan