Kościerzyna climate — normals and trends
Kościerzyna (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.2 °C and it receives 626 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 (17.0 °C on average) and the coldest is January (-2.6 °C). Rainfall peaks in July.
Kościerzyna averages 107 frost days, 1 hot days (≥ 30 °C) and 133 rainy days per year.
Kościerzyna has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 129 to 85 per year over the period.
The hottest day of the period reached 34.7 °C (on 10 August 1992) and the coldest -30.2 °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
KościerzynaPomerania
- coords
- 54.12°, 17.98°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.2°C
Average daily high
10.5°C
Average daily low
3.9°C
Annual rainfall
626mm
Sunshine / day
7.3h
Mean relative humidity
82%
Average peak wind
20.5km/h
Seasonal range
19.6°C
Frost days (< 0 °C)
107 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
133 d/yr
Annual snowfall
65.5 cm
Average feels-like high
7.4 °C
Average feels-like low
0.4 °C
Average peak gust
39.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.42 · 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
34.7 °C
10 August 1992
Coldest day
-30.2 °C
1 February 1956
Wettest day
47 mm
8 June 1955
Windiest day
61.0 km/h
2 November 1981
Strongest gust
110.9 km/h
2 November 1981
Hottest feels-like
35.3 °C
30 July 1994
Coldest feels-like
-36.5 °C
1 February 1956
Snowiest day
20.2 cm
4 April 1970
Sunniest day
16.0 h
2 July 2025
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 | 3.1 °C | +3.7 °C | 73 mm | +32 mm |
| Feb | 1.8 °C | +1.5 °C | 19 mm | -17 mm |
| Mar | 9.7 °C | +5.2 °C | 15 mm | -23 mm |
| Apr | 14.1 °C | +3.6 °C | 31 mm | -11 mm |
| May | 14.3 °C | -1.6 °C | 53 mm | -8 mm |
| Jun | 20.1 °C | +0.8 °C | 61 mm | -7 mm |
| Jul | 21.8 °C | +0.8 °C | 125 mm | +41 mm |
| Aug | 20.9 °C | +0.1 °C | 71 mm | +0 mm |
| Sep | 18.7 °C | +2.0 °C | 33 mm | -19 mm |
| Oct | 11.1 °C | -0.1 °C | 72 mm | +29 mm |
| Nov | 5.4 °C | +0.5 °C | 42 mm | -2 mm |
| Dec | 3.7 °C | +2.4 °C | 15 mm | -29 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 Kościerzyna?
Kościerzyna has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.2 °C and it receives 626 mm of precipitation per year.
What is the hottest day ever recorded in Kościerzyna?
The hottest day measured in Kościerzyna between 1940 and 2025 was 10 August 1992, reaching 34.7 °C.
What is the coldest day in Kościerzyna?
The coldest day measured in Kościerzyna between 1940 and 2025 was 1 February 1956, at -30.2 °C.
Does it snow in Kościerzyna?
Yes. Kościerzyna gets on average 65.5 cm of snow per year and has around 107 frost days.
Has the climate of Kościerzyna warmed?
Yes: Kościerzyna warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kościerzyna?
The wettest day measured in Kościerzyna between 1940 and 2025 was 8 June 1955, with 47 mm of rain in 24 hours.
What was the windiest day in Kościerzyna?
The windiest day measured in Kościerzyna between 1940 and 2025 was 2 November 1981, with winds reaching 61.0 km/h.
What is the warmest month in Kościerzyna?
The warmest month in Kościerzyna is July (17.0 °C on average); the coldest is January (-2.6 °C).
How much does it rain in Kościerzyna?
Kościerzyna receives on average 626 mm of precipitation per year, spread over about 133 rainy days.
Is it sunny in Kościerzyna?
Kościerzyna gets on average 7.3 hours of sunshine per day, roughly 2,665 hours per year over 1940-2025.
What is the biggest single-day snowfall in Kościerzyna?
The heaviest 24-hour snowfall measured in Kościerzyna between 1940 and 2025 was 4 April 1970, with 20.2 cm.
Are there tropical nights in Kościerzyna?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Kościerzyna.
What was the most extreme apparent temperature in Kościerzyna?
In Kościerzyna, between 1940 and 2025, the highest apparent temperature reached 35.3 °C on 30 July 1994, and the lowest was -36.5 °C on 1 February 1956.
Compare Kościerzyna with another city
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Nearby cities
The climate around Kościerzyna