Kozel'sk climate — normals and trends
Kozel'sk (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.2 °C and it receives 655 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 (18.4 °C on average) and the coldest is January (-8.5 °C). Rainfall peaks in July.
Kozel'sk averages 153 frost days, 3 hot days (≥ 30 °C) and 131 rainy days per year.
Kozel'sk has warmed by +3.3 °C between 1940 and 2025, or +0.39 °C per decade. This trend is statistically significant.
The number of frost days there went from about 169 to 137 per year over the period.
The hottest day of the period reached 37.9 °C (on 6 August 2010) and the coldest -42.7 °C (on 17 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
Kozel'skKaluga Oblast
- coords
- 54.04°, 35.77°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.2°C
Average daily high
8.8°C
Average daily low
1.4°C
Annual rainfall
655mm
Sunshine / day
6.9h
Mean relative humidity
79%
Average peak wind
20.3km/h
Seasonal range
26.9°C
Frost days (< 0 °C)
153 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
119.1 cm
Average feels-like high
5.5 °C
Average feels-like low
-2.3 °C
Average peak gust
36.4 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.3 °C
since 1940
+0.4 °C per decade · r² = 0.53 · 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
37.9 °C
6 August 2010
Coldest day
-42.7 °C
17 January 1940
Wettest day
66 mm
27 June 2015
Windiest day
59.4 km/h
21 March 2003
Strongest gust
104.0 km/h
23 November 2008
Hottest feels-like
37.2 °C
15 July 1951
Coldest feels-like
-48.0 °C
17 January 1940
Snowiest day
18.4 cm
14 December 1981
Sunniest day
16.3 h
20 June 2023
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 | 1.8 °C | +7.8 °C | 30 mm | -6 mm |
| Feb | -3.0 °C | +2.0 °C | 11 mm | -24 mm |
| Mar | 7.6 °C | +7.3 °C | 57 mm | +20 mm |
| Apr | 13.7 °C | +3.6 °C | 64 mm | +18 mm |
| May | 18.0 °C | +0.5 °C | 35 mm | -29 mm |
| Jun | 20.0 °C | -1.1 °C | 146 mm | +72 mm |
| Jul | 25.6 °C | +2.8 °C | 102 mm | +14 mm |
| Aug | 20.8 °C | -1.0 °C | 100 mm | +29 mm |
| Sep | 18.2 °C | +2.1 °C | 13 mm | -46 mm |
| Oct | 9.8 °C | +1.1 °C | 79 mm | +25 mm |
| Nov | 5.5 °C | +4.4 °C | 59 mm | +11 mm |
| Dec | -0.7 °C | +2.6 °C | 47 mm | +3 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 Kozel'sk?
Kozel'sk has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.2 °C and it receives 655 mm of precipitation per year.
What is the hottest day ever recorded in Kozel'sk?
The hottest day measured in Kozel'sk between 1940 and 2025 was 6 August 2010, reaching 37.9 °C.
What is the coldest day in Kozel'sk?
The coldest day measured in Kozel'sk between 1940 and 2025 was 17 January 1940, at -42.7 °C.
Does it snow in Kozel'sk?
Yes. Kozel'sk gets on average 119.1 cm of snow per year and has around 153 frost days.
Has the climate of Kozel'sk warmed?
Yes: Kozel'sk warmed by +3.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kozel'sk?
The wettest day measured in Kozel'sk between 1940 and 2025 was 27 June 2015, with 66 mm of rain in 24 hours.
What was the windiest day in Kozel'sk?
The windiest day measured in Kozel'sk between 1940 and 2025 was 21 March 2003, with winds reaching 59.4 km/h.
What is the warmest month in Kozel'sk?
The warmest month in Kozel'sk is July (18.4 °C on average); the coldest is January (-8.5 °C).
How much does it rain in Kozel'sk?
Kozel'sk receives on average 655 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Kozel'sk?
Kozel'sk gets on average 6.9 hours of sunshine per day, roughly 2,519 hours per year over 1940-2025.
What is the biggest single-day snowfall in Kozel'sk?
The heaviest 24-hour snowfall measured in Kozel'sk between 1940 and 2025 was 14 December 1981, with 18.4 cm.
Are there tropical nights in Kozel'sk?
Yes: Kozel'sk has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kozel'sk?
In Kozel'sk, between 1940 and 2025, the highest apparent temperature reached 37.2 °C on 15 July 1951, and the lowest was -48.0 °C on 17 January 1940.
Compare Kozel'sk with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kozel'sk