Bostānābād climate — normals and trends
Bostānābād (Iran) has a warm-summer mediterranean continental climate (Dsb) under the Köppen-Geiger classification. Its mean annual temperature is 6.4 °C and it receives 775 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 (19.2 °C on average) and the coldest is January (-7.4 °C). Rainfall peaks in May.
Bostānābād averages 159 frost days, 12 hot days (≥ 30 °C) and 121 rainy days per year.
Bostānābād has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.
The number of frost days there went from about 175 to 143 per year over the period.
The hottest day of the period reached 35.8 °C (on 19 August 2025) and the coldest -26.8 °C (on 13 January 1940).
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
BostānābādEast Azerbaijan Province
- coords
- 37.85°, 46.84°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.4°C
Average daily high
12.7°C
Average daily low
1.0°C
Annual rainfall
775mm
Sunshine / day
10.7h
Mean relative humidity
65%
Average peak wind
15.0km/h
Seasonal range
26.6°C
Frost days (< 0 °C)
159 d/yr
Hot days (≥ 30 °C)
12 d/yr
Rainy days (≥ 1 mm)
121 d/yr
Annual snowfall
188.3 cm
Average feels-like high
9.9 °C
Average feels-like low
-2.2 °C
Average peak gust
34.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
19.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.47 · 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
35.8 °C
19 August 2025
Coldest day
-26.8 °C
13 January 1940
Wettest day
46 mm
5 July 1965
Windiest day
49.2 km/h
21 April 2015
Strongest gust
109.1 km/h
9 November 1956
Hottest feels-like
34.7 °C
3 August 2011
Coldest feels-like
-32.0 °C
13 January 1940
Snowiest day
25.8 cm
6 November 1994
Sunniest day
14.0 h
22 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 | 2.2 °C | +4.8 °C | 15 mm | -31 mm |
| Feb | -0.9 °C | 0.0 °C | 63 mm | +6 mm |
| Mar | 10.0 °C | +6.2 °C | 55 mm | -31 mm |
| Apr | 14.6 °C | +3.6 °C | 119 mm | +8 mm |
| May | 21.1 °C | +3.5 °C | 85 mm | -59 mm |
| Jun | 24.8 °C | +1.7 °C | 39 mm | -38 mm |
| Jul | 28.8 °C | +1.7 °C | 8 mm | -24 mm |
| Aug | 31.6 °C | +4.5 °C | 8 mm | -17 mm |
| Sep | 24.1 °C | +1.1 °C | 26 mm | -7 mm |
| Oct | 19.7 °C | +4.1 °C | 26 mm | -40 mm |
| Nov | 13.1 °C | +5.8 °C | 10 mm | -45 mm |
| Dec | 2.9 °C | +2.6 °C | 81 mm | +37 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 Bostānābād?
Bostānābād has a warm-summer mediterranean continental climate (Köppen Dsb). Over 1940-2025, the average annual temperature is 6.4 °C and it receives 775 mm of precipitation per year.
What is the hottest day ever recorded in Bostānābād?
The hottest day measured in Bostānābād between 1940 and 2025 was 19 August 2025, reaching 35.8 °C.
What is the coldest day in Bostānābād?
The coldest day measured in Bostānābād between 1940 and 2025 was 13 January 1940, at -26.8 °C.
Does it snow in Bostānābād?
Yes. Bostānābād gets on average 188.3 cm of snow per year and has around 159 frost days.
Has the climate of Bostānābād warmed?
Yes: Bostānābād warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bostānābād?
The wettest day measured in Bostānābād between 1940 and 2025 was 5 July 1965, with 46 mm of rain in 24 hours.
What was the windiest day in Bostānābād?
The windiest day measured in Bostānābād between 1940 and 2025 was 21 April 2015, with winds reaching 49.2 km/h.
What is the warmest month in Bostānābād?
The warmest month in Bostānābād is July (19.2 °C on average); the coldest is January (-7.4 °C).
How much does it rain in Bostānābād?
Bostānābād receives on average 775 mm of precipitation per year, spread over about 121 rainy days.
Is it sunny in Bostānābād?
Bostānābād gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bostānābād?
The heaviest 24-hour snowfall measured in Bostānābād between 1940 and 2025 was 6 November 1994, with 25.8 cm.
Are there tropical nights in Bostānābād?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Bostānābād.
What was the most extreme apparent temperature in Bostānābād?
In Bostānābād, between 1940 and 2025, the highest apparent temperature reached 34.7 °C on 3 August 2011, and the lowest was -32.0 °C on 13 January 1940.
Compare Bostānābād with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bostānābād