Būkān climate — normals and trends
Būkān (Iran) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 11.9 °C and it receives 332 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 (26.2 °C on average) and the coldest is January (-2.5 °C). Rainfall peaks in March.
Būkān averages 109 frost days, 90 hot days (≥ 30 °C) and 68 rainy days per year.
Būkān has warmed by +3.4 °C between 1940 and 2025, or +0.40 °C per decade. This trend is statistically significant.
The number of frost days there went from about 132 to 86 per year over the period.
The hottest day of the period reached 41.5 °C (on 27 July 2018) and the coldest -27.4 °C (on 21 January 1982).
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
BūkānWest Azerbaijan Province
- coords
- 36.52°, 46.21°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.9°C
Average daily high
19.0°C
Average daily low
5.4°C
Annual rainfall
332mm
Sunshine / day
11.0h
Mean relative humidity
52%
Average peak wind
15.1km/h
Seasonal range
28.7°C
Frost days (< 0 °C)
109 d/yr
Hot days (≥ 30 °C)
90 d/yr
Rainy days (≥ 1 mm)
68 d/yr
Annual snowfall
63.8 cm
Average feels-like high
16.2 °C
Average feels-like low
2.3 °C
Average peak gust
35.2 km/h
Tropical nights (≥ 20 °C)
9 d/yr
Solar radiation
19.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.4 °C
since 1940
+0.4 °C per decade · r² = 0.51 · 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
41.5 °C
27 July 2018
Coldest day
-27.4 °C
21 January 1982
Wettest day
43 mm
9 December 2025
Windiest day
41.7 km/h
3 April 2004
Strongest gust
105.8 km/h
4 March 2013
Hottest feels-like
41.6 °C
10 July 2018
Coldest feels-like
-32.3 °C
21 January 1982
Snowiest day
20.7 cm
21 December 2002
Sunniest day
14.0 h
24 May 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 | 6.2 °C | +3.3 °C | 11 mm | -28 mm |
| Feb | 4.9 °C | -0.3 °C | 39 mm | -5 mm |
| Mar | 14.7 °C | +4.1 °C | 38 mm | -21 mm |
| Apr | 19.8 °C | +2.8 °C | 60 mm | +3 mm |
| May | 27.1 °C | +3.9 °C | 26 mm | -8 mm |
| Jun | 31.9 °C | +1.7 °C | 2 mm | -5 mm |
| Jul | 35.9 °C | +1.4 °C | 0 mm | -2 mm |
| Aug | 38.0 °C | +3.9 °C | 0 mm | -1 mm |
| Sep | 29.9 °C | +0.5 °C | 0 mm | -2 mm |
| Oct | 24.8 °C | +3.1 °C | 1 mm | -15 mm |
| Nov | 16.8 °C | +3.9 °C | 13 mm | -21 mm |
| Dec | 7.4 °C | +1.6 °C | 113 mm | +75 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 Būkān?
Būkān has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 11.9 °C and it receives 332 mm of precipitation per year.
What is the hottest day ever recorded in Būkān?
The hottest day measured in Būkān between 1940 and 2025 was 27 July 2018, reaching 41.5 °C.
What is the coldest day in Būkān?
The coldest day measured in Būkān between 1940 and 2025 was 21 January 1982, at -27.4 °C.
Does it snow in Būkān?
Yes. Būkān gets on average 63.8 cm of snow per year and has around 109 frost days.
Has the climate of Būkān warmed?
Yes: Būkān warmed by +3.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Būkān?
The wettest day measured in Būkān between 1940 and 2025 was 9 December 2025, with 43 mm of rain in 24 hours.
What was the windiest day in Būkān?
The windiest day measured in Būkān between 1940 and 2025 was 3 April 2004, with winds reaching 41.7 km/h.
What is the warmest month in Būkān?
The warmest month in Būkān is July (26.2 °C on average); the coldest is January (-2.5 °C).
How much does it rain in Būkān?
Būkān receives on average 332 mm of precipitation per year, spread over about 68 rainy days.
Is it sunny in Būkān?
Būkān 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 Būkān?
The heaviest 24-hour snowfall measured in Būkān between 1940 and 2025 was 21 December 2002, with 20.7 cm.
Are there tropical nights in Būkān?
Yes: Būkān has on average 9 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Būkān?
In Būkān, between 1940 and 2025, the highest apparent temperature reached 41.6 °C on 10 July 2018, and the lowest was -32.3 °C on 21 January 1982.
Compare Būkān with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Būkān