Chełmek climate — normals and trends
Chełmek (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.2 °C and it receives 861 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 (18.2 °C on average) and the coldest is January (-2.8 °C). Rainfall peaks in July.
Chełmek averages 103 frost days, 4 hot days (≥ 30 °C) and 153 rainy days per year.
Chełmek has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.
The number of frost days there went from about 124 to 82 per year over the period.
The hottest day of the period reached 36.4 °C (on 8 August 2013) and the coldest -29.2 °C (on 11 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
ChełmekLesser Poland
- coords
- 50.10°, 19.25°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.2°C
Average daily high
12.2°C
Average daily low
4.3°C
Annual rainfall
861mm
Sunshine / day
7.5h
Mean relative humidity
79%
Average peak wind
16.4km/h
Seasonal range
21.0°C
Frost days (< 0 °C)
103 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
153 d/yr
Annual snowfall
96.2 cm
Average feels-like high
9.9 °C
Average feels-like low
1.5 °C
Average peak gust
33.3 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
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.58 · 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
36.4 °C
8 August 2013
Coldest day
-29.2 °C
11 January 1940
Wettest day
72 mm
8 July 1997
Windiest day
50.0 km/h
12 February 1962
Strongest gust
113.8 km/h
19 January 2007
Hottest feels-like
40.2 °C
8 July 1957
Coldest feels-like
-34.8 °C
11 January 1940
Snowiest day
16.2 cm
3 April 1970
Sunniest day
15.6 h
27 June 2019
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 | 5.2 °C | +5.3 °C | 57 mm | +4 mm |
| Feb | 4.1 °C | +2.3 °C | 27 mm | -26 mm |
| Mar | 12.2 °C | +5.4 °C | 56 mm | +2 mm |
| Apr | 16.3 °C | +3.3 °C | 53 mm | -11 mm |
| May | 16.0 °C | -1.9 °C | 85 mm | -7 mm |
| Jun | 23.6 °C | +2.6 °C | 79 mm | -22 mm |
| Jul | 23.8 °C | +1.0 °C | 167 mm | +57 mm |
| Aug | 24.6 °C | +1.9 °C | 52 mm | -39 mm |
| Sep | 20.1 °C | +1.6 °C | 102 mm | +31 mm |
| Oct | 12.4 °C | -0.9 °C | 84 mm | +27 mm |
| Nov | 7.7 °C | +1.0 °C | 87 mm | +27 mm |
| Dec | 4.2 °C | +2.3 °C | 14 mm | -43 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 Chełmek?
Chełmek has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.2 °C and it receives 861 mm of precipitation per year.
What is the hottest day ever recorded in Chełmek?
The hottest day measured in Chełmek between 1940 and 2025 was 8 August 2013, reaching 36.4 °C.
What is the coldest day in Chełmek?
The coldest day measured in Chełmek between 1940 and 2025 was 11 January 1940, at -29.2 °C.
Does it snow in Chełmek?
Yes. Chełmek gets on average 96.2 cm of snow per year and has around 103 frost days.
Has the climate of Chełmek warmed?
Yes: Chełmek warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chełmek?
The wettest day measured in Chełmek between 1940 and 2025 was 8 July 1997, with 72 mm of rain in 24 hours.
What was the windiest day in Chełmek?
The windiest day measured in Chełmek between 1940 and 2025 was 12 February 1962, with winds reaching 50.0 km/h.
What is the warmest month in Chełmek?
The warmest month in Chełmek is July (18.2 °C on average); the coldest is January (-2.8 °C).
How much does it rain in Chełmek?
Chełmek receives on average 861 mm of precipitation per year, spread over about 153 rainy days.
Is it sunny in Chełmek?
Chełmek gets on average 7.5 hours of sunshine per day, roughly 2,738 hours per year over 1940-2025.
What is the biggest single-day snowfall in Chełmek?
The heaviest 24-hour snowfall measured in Chełmek between 1940 and 2025 was 3 April 1970, with 16.2 cm.
Are there tropical nights in Chełmek?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Chełmek.
What was the most extreme apparent temperature in Chełmek?
In Chełmek, between 1940 and 2025, the highest apparent temperature reached 40.2 °C on 8 July 1957, and the lowest was -34.8 °C on 11 January 1940.
Compare Chełmek with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chełmek