Ozersk climate — normals and trends
Ozersk (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 2.4 °C and it receives 502 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 (-14.6 °C). Rainfall peaks in July.
Ozersk averages 181 frost days, 5 hot days (≥ 30 °C) and 103 rainy days per year.
Ozersk has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 191 to 171 per year over the period.
The hottest day of the period reached 39.3 °C (on 11 July 2023) and the coldest -42.3 °C (on 1 January 1979).
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
OzerskChelyabinsk Oblast
- coords
- 55.76°, 60.70°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
2.4°C
Average daily high
6.3°C
Average daily low
-1.6°C
Annual rainfall
502mm
Sunshine / day
7.8h
Mean relative humidity
74%
Average peak wind
16.5km/h
Seasonal range
33.0°C
Frost days (< 0 °C)
181 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
103 d/yr
Annual snowfall
102.9 cm
Average feels-like high
3.0 °C
Average feels-like low
-5.4 °C
Average peak gust
35.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.46 · 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
39.3 °C
11 July 2023
Coldest day
-42.3 °C
1 January 1979
Wettest day
54 mm
26 September 2022
Windiest day
44.9 km/h
10 December 1965
Strongest gust
94.0 km/h
27 April 1964
Hottest feels-like
39.4 °C
29 July 1952
Coldest feels-like
-48.5 °C
1 January 1979
Snowiest day
24.2 cm
25 April 2014
Sunniest day
16.1 h
18 June 2024
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 | -4.4 °C | +7.1 °C | 23 mm | +6 mm |
| Feb | -4.2 °C | +4.8 °C | 4 mm | -13 mm |
| Mar | 3.0 °C | +4.5 °C | 32 mm | +10 mm |
| Apr | 12.6 °C | +4.0 °C | 60 mm | +29 mm |
| May | 18.9 °C | +2.2 °C | 32 mm | -18 mm |
| Jun | 23.4 °C | +2.0 °C | 125 mm | +60 mm |
| Jul | 22.0 °C | -0.8 °C | 91 mm | -0 mm |
| Aug | 20.9 °C | +0.3 °C | 57 mm | -9 mm |
| Sep | 15.7 °C | +1.1 °C | 52 mm | +2 mm |
| Oct | 8.4 °C | +2.6 °C | 13 mm | -28 mm |
| Nov | 2.6 °C | +5.8 °C | 28 mm | -1 mm |
| Dec | -6.8 °C | +2.3 °C | 36 mm | +13 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 Ozersk?
Ozersk has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 2.4 °C and it receives 502 mm of precipitation per year.
What is the hottest day ever recorded in Ozersk?
The hottest day measured in Ozersk between 1940 and 2025 was 11 July 2023, reaching 39.3 °C.
What is the coldest day in Ozersk?
The coldest day measured in Ozersk between 1940 and 2025 was 1 January 1979, at -42.3 °C.
Does it snow in Ozersk?
Yes. Ozersk gets on average 102.9 cm of snow per year and has around 181 frost days.
Has the climate of Ozersk warmed?
Yes: Ozersk warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ozersk?
The wettest day measured in Ozersk between 1940 and 2025 was 26 September 2022, with 54 mm of rain in 24 hours.
What was the windiest day in Ozersk?
The windiest day measured in Ozersk between 1940 and 2025 was 10 December 1965, with winds reaching 44.9 km/h.
What is the warmest month in Ozersk?
The warmest month in Ozersk is July (18.4 °C on average); the coldest is January (-14.6 °C).
How much does it rain in Ozersk?
Ozersk receives on average 502 mm of precipitation per year, spread over about 103 rainy days.
Is it sunny in Ozersk?
Ozersk gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ozersk?
The heaviest 24-hour snowfall measured in Ozersk between 1940 and 2025 was 25 April 2014, with 24.2 cm.
Are there tropical nights in Ozersk?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ozersk.
What was the most extreme apparent temperature in Ozersk?
In Ozersk, between 1940 and 2025, the highest apparent temperature reached 39.4 °C on 29 July 1952, and the lowest was -48.5 °C on 1 January 1979.
Compare Ozersk with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ozersk