Biysk climate — normals and trends
Biysk (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 2.8 °C and it receives 565 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 (20.9 °C on average) and the coldest is January (-16.5 °C). Rainfall peaks in July.
Biysk averages 182 frost days, 15 hot days (≥ 30 °C) and 121 rainy days per year.
Biysk has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The number of frost days there went from about 191 to 173 per year over the period.
The hottest day of the period reached 41.9 °C (on 15 July 1992) and the coldest -47.9 °C (on 7 January 2001).
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
BiyskAltai Krai
- coords
- 52.53°, 85.20°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
2.8°C
Average daily high
7.9°C
Average daily low
-2.0°C
Annual rainfall
565mm
Sunshine / day
8.6h
Mean relative humidity
72%
Average peak wind
15.6km/h
Seasonal range
37.4°C
Frost days (< 0 °C)
182 d/yr
Hot days (≥ 30 °C)
15 d/yr
Rainy days (≥ 1 mm)
121 d/yr
Annual snowfall
122.4 cm
Average feels-like high
4.9 °C
Average feels-like low
-5.4 °C
Average peak gust
30.0 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
12.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.29 · 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
41.9 °C
15 July 1992
Coldest day
-47.9 °C
7 January 2001
Wettest day
71 mm
4 August 2005
Windiest day
57.6 km/h
17 February 2004
Strongest gust
103.3 km/h
11 October 1959
Hottest feels-like
43.3 °C
15 July 1992
Coldest feels-like
-53.2 °C
7 January 2001
Snowiest day
18.6 cm
16 November 1957
Sunniest day
16.0 h
22 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 | -6.5 °C | +5.9 °C | 45 mm | +22 mm |
| Feb | -6.3 °C | +3.2 °C | 15 mm | -7 mm |
| Mar | 1.6 °C | +2.9 °C | 25 mm | -2 mm |
| Apr | 16.5 °C | +6.5 °C | 46 mm | +3 mm |
| May | 20.7 °C | +1.8 °C | 64 mm | +5 mm |
| Jun | 28.5 °C | +4.2 °C | 54 mm | -8 mm |
| Jul | 27.4 °C | +1.1 °C | 73 mm | +3 mm |
| Aug | 22.6 °C | -1.4 °C | 107 mm | +42 mm |
| Sep | 19.5 °C | +1.6 °C | 46 mm | -4 mm |
| Oct | 6.7 °C | -2.2 °C | 35 mm | -19 mm |
| Nov | 1.2 °C | +4.0 °C | 71 mm | +21 mm |
| Dec | -6.5 °C | +3.5 °C | 59 mm | +21 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 Biysk?
Biysk has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 2.8 °C and it receives 565 mm of precipitation per year.
What is the hottest day ever recorded in Biysk?
The hottest day measured in Biysk between 1940 and 2025 was 15 July 1992, reaching 41.9 °C.
What is the coldest day in Biysk?
The coldest day measured in Biysk between 1940 and 2025 was 7 January 2001, at -47.9 °C.
Does it snow in Biysk?
Yes. Biysk gets on average 122.4 cm of snow per year and has around 182 frost days.
Has the climate of Biysk warmed?
Yes: Biysk warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Biysk?
The wettest day measured in Biysk between 1940 and 2025 was 4 August 2005, with 71 mm of rain in 24 hours.
What was the windiest day in Biysk?
The windiest day measured in Biysk between 1940 and 2025 was 17 February 2004, with winds reaching 57.6 km/h.
What is the warmest month in Biysk?
The warmest month in Biysk is July (20.9 °C on average); the coldest is January (-16.5 °C).
How much does it rain in Biysk?
Biysk receives on average 565 mm of precipitation per year, spread over about 121 rainy days.
Is it sunny in Biysk?
Biysk gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.
What is the biggest single-day snowfall in Biysk?
The heaviest 24-hour snowfall measured in Biysk between 1940 and 2025 was 16 November 1957, with 18.6 cm.
Are there tropical nights in Biysk?
Yes: Biysk has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Biysk?
In Biysk, between 1940 and 2025, the highest apparent temperature reached 43.3 °C on 15 July 1992, and the lowest was -53.2 °C on 7 January 2001.
Compare Biysk with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Biysk