Korosten climate — normals and trends
Korosten (Ukraine) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.4 °C and it receives 637 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 (19.3 °C on average) and the coldest is January (-5.2 °C). Rainfall peaks in July.
Korosten averages 124 frost days, 6 hot days (≥ 30 °C) and 122 rainy days per year.
Korosten has warmed by +3.0 °C between 1940 and 2025, or +0.36 °C per decade. This trend is statistically significant.
The number of frost days there went from about 144 to 104 per year over the period.
The hottest day of the period reached 36.7 °C (on 7 August 2010) and the coldest -37.6 °C (on 10 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
KorostenZhytomyr Oblast
- coords
- 50.95°, 28.64°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.4°C
Average daily high
11.3°C
Average daily low
3.5°C
Annual rainfall
637mm
Sunshine / day
7.2h
Mean relative humidity
77%
Average peak wind
19.5km/h
Seasonal range
24.5°C
Frost days (< 0 °C)
124 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
122 d/yr
Annual snowfall
84.0 cm
Average feels-like high
8.4 °C
Average feels-like low
0.2 °C
Average peak gust
35.8 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
11.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.50 · 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
36.7 °C
7 August 2010
Coldest day
-37.6 °C
10 January 1940
Wettest day
73 mm
18 August 1961
Windiest day
67.0 km/h
22 February 1953
Strongest gust
96.8 km/h
31 December 1988
Hottest feels-like
38.9 °C
16 August 1952
Coldest feels-like
-43.0 °C
10 January 1940
Snowiest day
23.0 cm
15 February 1962
Sunniest day
16.0 h
9 June 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 | 3.9 °C | +6.6 °C | 22 mm | -14 mm |
| Feb | -0.8 °C | +0.6 °C | 10 mm | -25 mm |
| Mar | 11.6 °C | +7.7 °C | 27 mm | -12 mm |
| Apr | 15.6 °C | +3.0 °C | 41 mm | -9 mm |
| May | 16.7 °C | -2.3 °C | 126 mm | +63 mm |
| Jun | 23.0 °C | +0.4 °C | 58 mm | -15 mm |
| Jul | 25.7 °C | +1.6 °C | 123 mm | +33 mm |
| Aug | 24.1 °C | +0.5 °C | 66 mm | -3 mm |
| Sep | 21.3 °C | +2.8 °C | 46 mm | -7 mm |
| Oct | 11.0 °C | -0.6 °C | 78 mm | +33 mm |
| Nov | 7.9 °C | +3.6 °C | 34 mm | -10 mm |
| Dec | 2.7 °C | +3.0 °C | 36 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 Korosten?
Korosten has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.4 °C and it receives 637 mm of precipitation per year.
What is the hottest day ever recorded in Korosten?
The hottest day measured in Korosten between 1940 and 2025 was 7 August 2010, reaching 36.7 °C.
What is the coldest day in Korosten?
The coldest day measured in Korosten between 1940 and 2025 was 10 January 1940, at -37.6 °C.
Does it snow in Korosten?
Yes. Korosten gets on average 84.0 cm of snow per year and has around 124 frost days.
Has the climate of Korosten warmed?
Yes: Korosten warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Korosten?
The wettest day measured in Korosten between 1940 and 2025 was 18 August 1961, with 73 mm of rain in 24 hours.
What was the windiest day in Korosten?
The windiest day measured in Korosten between 1940 and 2025 was 22 February 1953, with winds reaching 67.0 km/h.
What is the warmest month in Korosten?
The warmest month in Korosten is July (19.3 °C on average); the coldest is January (-5.2 °C).
How much does it rain in Korosten?
Korosten receives on average 637 mm of precipitation per year, spread over about 122 rainy days.
Is it sunny in Korosten?
Korosten gets on average 7.2 hours of sunshine per day, roughly 2,628 hours per year over 1940-2025.
What is the biggest single-day snowfall in Korosten?
The heaviest 24-hour snowfall measured in Korosten between 1940 and 2025 was 15 February 1962, with 23.0 cm.
Are there tropical nights in Korosten?
Yes: Korosten has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Korosten?
In Korosten, between 1940 and 2025, the highest apparent temperature reached 38.9 °C on 16 August 1952, and the lowest was -43.0 °C on 10 January 1940.
Compare Korosten with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Korosten