Bahārestān climate — normals and trends
Bahārestān (Iran) has a cold desert climate (BWk) under the Köppen-Geiger classification. Its mean annual temperature is 15.9 °C and it receives 88 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 (29.7 °C on average) and the coldest is January (1.5 °C). Rainfall peaks in March.
Bahārestān averages 88 frost days, 127 hot days (≥ 30 °C) and 22 rainy days per year.
Bahārestān 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 106 to 70 per year over the period.
The hottest day of the period reached 43.3 °C (on 3 July 2025) and the coldest -24.8 °C (on 21 December 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
BahārestānIsfahan
- coords
- 32.49°, 51.77°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.9°C
Average daily high
23.2°C
Average daily low
8.6°C
Annual rainfall
88mm
Sunshine / day
11.1h
Mean relative humidity
35%
Average peak wind
13.4km/h
Seasonal range
28.2°C
Frost days (< 0 °C)
88 d/yr
Hot days (≥ 30 °C)
127 d/yr
Rainy days (≥ 1 mm)
22 d/yr
Annual snowfall
10.6 cm
Average feels-like high
20.5 °C
Average feels-like low
5.4 °C
Average peak gust
30.5 km/h
Tropical nights (≥ 20 °C)
49 d/yr
Solar radiation
21.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.52 · 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
43.3 °C
3 July 2025
Coldest day
-24.8 °C
21 December 1964
Wettest day
30 mm
20 December 1986
Windiest day
43.6 km/h
19 October 1984
Strongest gust
104.8 km/h
26 March 2003
Hottest feels-like
42.1 °C
1 August 2024
Coldest feels-like
-29.5 °C
21 December 1964
Snowiest day
14.1 cm
29 January 1972
Sunniest day
13.1 h
25 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 | 10.0 °C | +1.7 °C | 18 mm | +4 mm |
| Feb | 13.1 °C | +1.3 °C | 3 mm | -9 mm |
| Mar | 19.3 °C | +2.3 °C | 20 mm | +5 mm |
| Apr | 27.8 °C | +5.0 °C | 5 mm | -8 mm |
| May | 33.8 °C | +5.1 °C | 2 mm | -6 mm |
| Jun | 36.6 °C | +2.0 °C | 0 mm | -1 mm |
| Jul | 38.9 °C | +2.1 °C | 0 mm | -0 mm |
| Aug | 37.3 °C | +1.9 °C | 0 mm | -0 mm |
| Sep | 34.2 °C | +2.5 °C | 0 mm | -0 mm |
| Oct | 28.7 °C | +3.9 °C | 0 mm | -2 mm |
| Nov | 20.2 °C | +3.8 °C | 0 mm | -11 mm |
| Dec | 10.7 °C | +0.5 °C | 50 mm | +36 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 Bahārestān?
Bahārestān has a cold desert climate (Köppen BWk). Over 1940-2025, the average annual temperature is 15.9 °C and it receives 88 mm of precipitation per year.
What is the hottest day ever recorded in Bahārestān?
The hottest day measured in Bahārestān between 1940 and 2025 was 3 July 2025, reaching 43.3 °C.
What is the coldest day in Bahārestān?
The coldest day measured in Bahārestān between 1940 and 2025 was 21 December 1964, at -24.8 °C.
Does it snow in Bahārestān?
Yes. Bahārestān gets on average 10.6 cm of snow per year and has around 88 frost days.
Has the climate of Bahārestān warmed?
Yes: Bahārestān warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bahārestān?
The wettest day measured in Bahārestān between 1940 and 2025 was 20 December 1986, with 30 mm of rain in 24 hours.
What was the windiest day in Bahārestān?
The windiest day measured in Bahārestān between 1940 and 2025 was 19 October 1984, with winds reaching 43.6 km/h.
What is the warmest month in Bahārestān?
The warmest month in Bahārestān is July (29.7 °C on average); the coldest is January (1.5 °C).
How much does it rain in Bahārestān?
Bahārestān receives on average 88 mm of precipitation per year, spread over about 22 rainy days.
Is it sunny in Bahārestān?
Bahārestān gets on average 11.1 hours of sunshine per day, roughly 4,052 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bahārestān?
The heaviest 24-hour snowfall measured in Bahārestān between 1940 and 2025 was 29 January 1972, with 14.1 cm.
Are there tropical nights in Bahārestān?
Yes: Bahārestān has on average 49 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bahārestān?
In Bahārestān, between 1940 and 2025, the highest apparent temperature reached 42.1 °C on 1 August 2024, and the lowest was -29.5 °C on 21 December 1964.
Compare Bahārestān with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bahārestān