Chomutov climate — normals and trends
Chomutov (Czechia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.6 °C and it receives 639 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 (17.2 °C on average) and the coldest is January (-2.3 °C). Rainfall peaks in July.
Chomutov averages 109 frost days, 3 hot days (≥ 30 °C) and 135 rainy days per year.
Chomutov 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 131 to 87 per year over the period.
The hottest day of the period reached 36.9 °C (on 20 August 2012) and the coldest -27.9 °C (on 1 February 1956).
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
ChomutovÚstí nad Labem Region
- coords
- 50.46°, 13.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.6°C
Average daily high
11.3°C
Average daily low
3.9°C
Annual rainfall
639mm
Sunshine / day
7.7h
Mean relative humidity
78%
Average peak wind
15.1km/h
Seasonal range
19.5°C
Frost days (< 0 °C)
109 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
135 d/yr
Annual snowfall
71.7 cm
Average feels-like high
8.7 °C
Average feels-like low
1.2 °C
Average peak gust
34.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.53 · 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
36.9 °C
20 August 2012
Coldest day
-27.9 °C
1 February 1956
Wettest day
68 mm
3 August 1983
Windiest day
45.6 km/h
18 January 2007
Strongest gust
127.8 km/h
18 January 2007
Hottest feels-like
38.1 °C
20 August 1943
Coldest feels-like
-33.4 °C
1 February 1956
Snowiest day
19.3 cm
29 November 2012
Sunniest day
16.0 h
18 June 2000
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 | 3.4 °C | +3.4 °C | 52 mm | +12 mm |
| Feb | 2.3 °C | +0.7 °C | 9 mm | -28 mm |
| Mar | 10.6 °C | +4.4 °C | 24 mm | -19 mm |
| Apr | 15.6 °C | +4.0 °C | 48 mm | +1 mm |
| May | 17.4 °C | +0.9 °C | 46 mm | -21 mm |
| Jun | 24.7 °C | +4.7 °C | 47 mm | -28 mm |
| Jul | 23.3 °C | +1.5 °C | 104 mm | +25 mm |
| Aug | 24.8 °C | +3.1 °C | 33 mm | -39 mm |
| Sep | 19.4 °C | +1.8 °C | 92 mm | +43 mm |
| Oct | 11.3 °C | -0.4 °C | 51 mm | +9 mm |
| Nov | 5.7 °C | +0.6 °C | 32 mm | -12 mm |
| Dec | 3.4 °C | +1.9 °C | 21 mm | -23 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 Chomutov?
Chomutov has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.6 °C and it receives 639 mm of precipitation per year.
What is the hottest day ever recorded in Chomutov?
The hottest day measured in Chomutov between 1940 and 2025 was 20 August 2012, reaching 36.9 °C.
What is the coldest day in Chomutov?
The coldest day measured in Chomutov between 1940 and 2025 was 1 February 1956, at -27.9 °C.
Does it snow in Chomutov?
Yes. Chomutov gets on average 71.7 cm of snow per year and has around 109 frost days.
Has the climate of Chomutov warmed?
Yes: Chomutov warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chomutov?
The wettest day measured in Chomutov between 1940 and 2025 was 3 August 1983, with 68 mm of rain in 24 hours.
What was the windiest day in Chomutov?
The windiest day measured in Chomutov between 1940 and 2025 was 18 January 2007, with winds reaching 45.6 km/h.
What is the warmest month in Chomutov?
The warmest month in Chomutov is July (17.2 °C on average); the coldest is January (-2.3 °C).
How much does it rain in Chomutov?
Chomutov receives on average 639 mm of precipitation per year, spread over about 135 rainy days.
Is it sunny in Chomutov?
Chomutov gets on average 7.7 hours of sunshine per day, roughly 2,811 hours per year over 1940-2025.
What is the biggest single-day snowfall in Chomutov?
The heaviest 24-hour snowfall measured in Chomutov between 1940 and 2025 was 29 November 2012, with 19.3 cm.
Are there tropical nights in Chomutov?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Chomutov.
What was the most extreme apparent temperature in Chomutov?
In Chomutov, between 1940 and 2025, the highest apparent temperature reached 38.1 °C on 20 August 1943, and the lowest was -33.4 °C on 1 February 1956.
Compare Chomutov with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chomutov