Mahdishahr climate — normals and trends
Mahdishahr (Iran) has a hot-summer mediterranean continental climate (Dsa) under the Köppen-Geiger classification. Its mean annual temperature is 9.9 °C and it receives 397 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 (22.0 °C on average) and the coldest is January (-3.0 °C). Rainfall peaks in May.
Mahdishahr averages 115 frost days, 18 hot days (≥ 30 °C) and 90 rainy days per year.
Mahdishahr has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 136 to 94 per year over the period.
The hottest day of the period reached 36.2 °C (on 27 July 2014) and the coldest -21.4 °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
MahdishahrSemnan Province
- coords
- 35.71°, 53.35°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.9°C
Average daily high
14.7°C
Average daily low
5.5°C
Annual rainfall
397mm
Sunshine / day
10.8h
Mean relative humidity
58%
Average peak wind
10.0km/h
Seasonal range
25.0°C
Frost days (< 0 °C)
115 d/yr
Hot days (≥ 30 °C)
18 d/yr
Rainy days (≥ 1 mm)
90 d/yr
Annual snowfall
95.9 cm
Average feels-like high
12.5 °C
Average feels-like low
3.0 °C
Average peak gust
31.8 km/h
Tropical nights (≥ 20 °C)
7 d/yr
Solar radiation
18.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.46 · 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
36.2 °C
27 July 2014
Coldest day
-21.4 °C
20 January 1964
Wettest day
43 mm
7 May 1949
Windiest day
27.1 km/h
31 March 1948
Strongest gust
91.8 km/h
26 March 2003
Hottest feels-like
34.5 °C
14 August 1977
Coldest feels-like
-26.4 °C
20 January 1964
Snowiest day
23.9 cm
26 February 2020
Sunniest day
13.3 h
19 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 | 4.4 °C | +3.6 °C | 20 mm | -5 mm |
| Feb | 2.4 °C | +0.1 °C | 30 mm | -1 mm |
| Mar | 10.9 °C | +3.9 °C | 38 mm | -12 mm |
| Apr | 19.5 °C | +5.6 °C | 36 mm | -22 mm |
| May | 24.8 °C | +5.1 °C | 34 mm | -35 mm |
| Jun | 24.7 °C | -0.2 °C | 74 mm | +43 mm |
| Jul | 28.6 °C | +0.9 °C | 20 mm | +3 mm |
| Aug | 28.9 °C | +2.1 °C | 5 mm | -12 mm |
| Sep | 25.1 °C | +1.7 °C | 12 mm | -8 mm |
| Oct | 21.2 °C | +4.3 °C | 2 mm | -26 mm |
| Nov | 14.3 °C | +5.1 °C | 1 mm | -26 mm |
| Dec | 5.3 °C | +2.1 °C | 25 mm | -0 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 Mahdishahr?
Mahdishahr has a hot-summer mediterranean continental climate (Köppen Dsa). Over 1940-2025, the average annual temperature is 9.9 °C and it receives 397 mm of precipitation per year.
What is the hottest day ever recorded in Mahdishahr?
The hottest day measured in Mahdishahr between 1940 and 2025 was 27 July 2014, reaching 36.2 °C.
What is the coldest day in Mahdishahr?
The coldest day measured in Mahdishahr between 1940 and 2025 was 20 January 1964, at -21.4 °C.
Does it snow in Mahdishahr?
Yes. Mahdishahr gets on average 95.9 cm of snow per year and has around 115 frost days.
Has the climate of Mahdishahr warmed?
Yes: Mahdishahr warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mahdishahr?
The wettest day measured in Mahdishahr between 1940 and 2025 was 7 May 1949, with 43 mm of rain in 24 hours.
What was the windiest day in Mahdishahr?
The windiest day measured in Mahdishahr between 1940 and 2025 was 31 March 1948, with winds reaching 27.1 km/h.
What is the warmest month in Mahdishahr?
The warmest month in Mahdishahr is July (22.0 °C on average); the coldest is January (-3.0 °C).
How much does it rain in Mahdishahr?
Mahdishahr receives on average 397 mm of precipitation per year, spread over about 90 rainy days.
Is it sunny in Mahdishahr?
Mahdishahr 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 Mahdishahr?
The heaviest 24-hour snowfall measured in Mahdishahr between 1940 and 2025 was 26 February 2020, with 23.9 cm.
Are there tropical nights in Mahdishahr?
Yes: Mahdishahr has on average 7 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Mahdishahr?
In Mahdishahr, between 1940 and 2025, the highest apparent temperature reached 34.5 °C on 14 August 1977, and the lowest was -26.4 °C on 20 January 1964.
Compare Mahdishahr with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Mahdishahr