Borūjen climate — normals and trends
Borūjen (Iran) has a hot-summer mediterranean continental climate (Dsa) under the Köppen-Geiger classification. Its mean annual temperature is 10.3 °C and it receives 221 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 (24.0 °C on average) and the coldest is January (-4.7 °C). Rainfall peaks in March.
Borūjen averages 130 frost days, 41 hot days (≥ 30 °C) and 41 rainy days per year.
Borūjen has warmed by +2.6 °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 145 to 115 per year over the period.
The hottest day of the period reached 37.3 °C (on 6 July 2025) and the coldest -31.9 °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
BorūjenChaharmahal and Bakhtiari Province
- coords
- 31.97°, 51.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.3°C
Average daily high
16.7°C
Average daily low
4.3°C
Annual rainfall
221mm
Sunshine / day
11.1h
Mean relative humidity
46%
Average peak wind
13.8km/h
Seasonal range
28.7°C
Frost days (< 0 °C)
130 d/yr
Hot days (≥ 30 °C)
41 d/yr
Rainy days (≥ 1 mm)
41 d/yr
Annual snowfall
82.8 cm
Average feels-like high
13.8 °C
Average feels-like low
0.7 °C
Average peak gust
37.2 km/h
Tropical nights (≥ 20 °C)
3 d/yr
Solar radiation
21.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.38 · 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
37.3 °C
6 July 2025
Coldest day
-31.9 °C
20 January 1964
Wettest day
62 mm
20 December 1986
Windiest day
42.5 km/h
19 April 1973
Strongest gust
109.1 km/h
19 April 1973
Hottest feels-like
37.0 °C
28 July 2024
Coldest feels-like
-37.2 °C
20 January 1964
Snowiest day
42.8 cm
20 December 1986
Sunniest day
13.1 h
19 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 | 5.9 °C | +4.8 °C | 34 mm | -3 mm |
| Feb | 7.4 °C | +4.3 °C | 12 mm | -22 mm |
| Mar | 12.8 °C | +4.2 °C | 60 mm | +22 mm |
| Apr | 20.8 °C | +5.5 °C | 21 mm | -8 mm |
| May | 27.5 °C | +5.9 °C | 5 mm | -10 mm |
| Jun | 31.3 °C | +3.2 °C | 2 mm | -0 mm |
| Jul | 33.0 °C | +2.5 °C | 1 mm | -1 mm |
| Aug | 31.5 °C | +2.0 °C | 0 mm | -1 mm |
| Sep | 28.9 °C | +2.8 °C | 0 mm | -1 mm |
| Oct | 23.7 °C | +4.2 °C | 0 mm | -6 mm |
| Nov | 16.2 °C | +4.5 °C | 1 mm | -23 mm |
| Dec | 6.4 °C | +1.6 °C | 80 mm | +45 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 Borūjen?
Borūjen has a hot-summer mediterranean continental climate (Köppen Dsa). Over 1940-2025, the average annual temperature is 10.3 °C and it receives 221 mm of precipitation per year.
What is the hottest day ever recorded in Borūjen?
The hottest day measured in Borūjen between 1940 and 2025 was 6 July 2025, reaching 37.3 °C.
What is the coldest day in Borūjen?
The coldest day measured in Borūjen between 1940 and 2025 was 20 January 1964, at -31.9 °C.
Does it snow in Borūjen?
Yes. Borūjen gets on average 82.8 cm of snow per year and has around 130 frost days.
Has the climate of Borūjen warmed?
Yes: Borūjen warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Borūjen?
The wettest day measured in Borūjen between 1940 and 2025 was 20 December 1986, with 62 mm of rain in 24 hours.
What was the windiest day in Borūjen?
The windiest day measured in Borūjen between 1940 and 2025 was 19 April 1973, with winds reaching 42.5 km/h.
What is the warmest month in Borūjen?
The warmest month in Borūjen is July (24.0 °C on average); the coldest is January (-4.7 °C).
How much does it rain in Borūjen?
Borūjen receives on average 221 mm of precipitation per year, spread over about 41 rainy days.
Is it sunny in Borūjen?
Borūjen 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 Borūjen?
The heaviest 24-hour snowfall measured in Borūjen between 1940 and 2025 was 20 December 1986, with 42.8 cm.
Are there tropical nights in Borūjen?
Yes: Borūjen has on average 3 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Borūjen?
In Borūjen, between 1940 and 2025, the highest apparent temperature reached 37.0 °C on 28 July 2024, and the lowest was -37.2 °C on 20 January 1964.
Compare Borūjen with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Borūjen