Bratsk climate — normals and trends
Bratsk (Russia) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is -1.5 °C and it receives 373 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 (17.9 °C on average) and the coldest is January (-22.0 °C). Rainfall peaks in July.
Bratsk averages 214 frost days, 0 hot days (≥ 30 °C) and 95 rainy days per year.
Bratsk has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 221 to 207 per year over the period.
The hottest day of the period reached 32.8 °C (on 22 July 2002) and the coldest -51.3 °C (on 28 December 1949).
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
BratskIrkutsk Oblast
- coords
- 56.13°, 101.61°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
-1.5°C
Average daily high
2.8°C
Average daily low
-6.0°C
Annual rainfall
373mm
Sunshine / day
8.4h
Mean relative humidity
73%
Average peak wind
15.0km/h
Seasonal range
39.9°C
Frost days (< 0 °C)
214 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
95 d/yr
Annual snowfall
85.4 cm
Average feels-like high
-0.7 °C
Average feels-like low
-9.8 °C
Average peak gust
32.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.32 · 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
32.8 °C
22 July 2002
Coldest day
-51.3 °C
28 December 1949
Wettest day
61 mm
28 July 1960
Windiest day
43.6 km/h
19 April 2019
Strongest gust
96.8 km/h
4 March 2023
Hottest feels-like
34.5 °C
22 July 2002
Coldest feels-like
-56.5 °C
28 December 1949
Snowiest day
13.1 cm
30 September 2022
Sunniest day
16.9 h
24 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -11.5 °C | +6.7 °C | 11 mm | +0 mm |
| Feb | -12.6 °C | +1.4 °C | 20 mm | +11 mm |
| Mar | 0.0 °C | +4.1 °C | 21 mm | +9 mm |
| Apr | 6.7 °C | +2.3 °C | 36 mm | +14 mm |
| May | 13.8 °C | +1.7 °C | 35 mm | -3 mm |
| Jun | 21.7 °C | +2.4 °C | 47 mm | -3 mm |
| Jul | 22.5 °C | +0.2 °C | 40 mm | -22 mm |
| Aug | 21.5 °C | +1.6 °C | 35 mm | -24 mm |
| Sep | 14.8 °C | +2.2 °C | 43 mm | -1 mm |
| Oct | 0.7 °C | -2.9 °C | 19 mm | -8 mm |
| Nov | -3.5 °C | +4.1 °C | 30 mm | +8 mm |
| Dec | -15.3 °C | +0.9 °C | 22 mm | +4 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 Bratsk?
Bratsk has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is -1.5 °C and it receives 373 mm of precipitation per year.
What is the hottest day ever recorded in Bratsk?
The hottest day measured in Bratsk between 1940 and 2025 was 22 July 2002, reaching 32.8 °C.
What is the coldest day in Bratsk?
The coldest day measured in Bratsk between 1940 and 2025 was 28 December 1949, at -51.3 °C.
Does it snow in Bratsk?
Yes. Bratsk gets on average 85.4 cm of snow per year and has around 214 frost days.
Has the climate of Bratsk warmed?
Yes: Bratsk warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bratsk?
The wettest day measured in Bratsk between 1940 and 2025 was 28 July 1960, with 61 mm of rain in 24 hours.
What was the windiest day in Bratsk?
The windiest day measured in Bratsk between 1940 and 2025 was 19 April 2019, with winds reaching 43.6 km/h.
What is the warmest month in Bratsk?
The warmest month in Bratsk is July (17.9 °C on average); the coldest is January (-22.0 °C).
How much does it rain in Bratsk?
Bratsk receives on average 373 mm of precipitation per year, spread over about 95 rainy days.
Is it sunny in Bratsk?
Bratsk gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bratsk?
The heaviest 24-hour snowfall measured in Bratsk between 1940 and 2025 was 30 September 2022, with 13.1 cm.
Are there tropical nights in Bratsk?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Bratsk.
What was the most extreme apparent temperature in Bratsk?
In Bratsk, between 1940 and 2025, the highest apparent temperature reached 34.5 °C on 22 July 2002, and the lowest was -56.5 °C on 28 December 1949.
Compare Bratsk with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bratsk