Słupca climate — normals and trends
Słupca (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.7 °C and it receives 590 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 (18.8 °C on average) and the coldest is January (-1.7 °C). Rainfall peaks in July.
Słupca averages 92 frost days, 6 hot days (≥ 30 °C) and 124 rainy days per year.
Słupca has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 110 to 74 per year over the period.
The hottest day of the period reached 38.3 °C (on 21 July 2022) and the coldest -29.6 °C (on 14 January 1987).
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
SłupcaGreater Poland
- coords
- 52.29°, 17.87°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.7°C
Average daily high
12.3°C
Average daily low
5.0°C
Annual rainfall
590mm
Sunshine / day
7.4h
Mean relative humidity
77%
Average peak wind
19.3km/h
Seasonal range
20.5°C
Frost days (< 0 °C)
92 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
124 d/yr
Annual snowfall
46.5 cm
Average feels-like high
9.5 °C
Average feels-like low
1.8 °C
Average peak gust
36.6 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.45 · 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
38.3 °C
21 July 2022
Coldest day
-29.6 °C
14 January 1987
Wettest day
64 mm
10 July 1980
Windiest day
57.6 km/h
24 November 1984
Strongest gust
113.0 km/h
21 October 1986
Hottest feels-like
38.5 °C
8 August 2015
Coldest feels-like
-34.5 °C
14 January 1987
Snowiest day
13.0 cm
26 November 1969
Sunniest day
16.0 h
2 July 1942
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 | 4.8 °C | +4.3 °C | 48 mm | +10 mm |
| Feb | 3.1 °C | +1.1 °C | 18 mm | -18 mm |
| Mar | 11.8 °C | +5.2 °C | 24 mm | -14 mm |
| Apr | 17.0 °C | +4.2 °C | 32 mm | -8 mm |
| May | 16.6 °C | -1.4 °C | 62 mm | +6 mm |
| Jun | 23.5 °C | +1.9 °C | 51 mm | -10 mm |
| Jul | 24.1 °C | +0.8 °C | 104 mm | +23 mm |
| Aug | 24.2 °C | +1.0 °C | 62 mm | -2 mm |
| Sep | 20.6 °C | +1.9 °C | 55 mm | +7 mm |
| Oct | 12.2 °C | -0.6 °C | 70 mm | +30 mm |
| Nov | 6.9 °C | +0.6 °C | 47 mm | +4 mm |
| Dec | 3.9 °C | +1.6 °C | 16 mm | -27 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 Słupca?
Słupca has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.7 °C and it receives 590 mm of precipitation per year.
What is the hottest day ever recorded in Słupca?
The hottest day measured in Słupca between 1940 and 2025 was 21 July 2022, reaching 38.3 °C.
What is the coldest day in Słupca?
The coldest day measured in Słupca between 1940 and 2025 was 14 January 1987, at -29.6 °C.
Does it snow in Słupca?
Yes. Słupca gets on average 46.5 cm of snow per year and has around 92 frost days.
Has the climate of Słupca warmed?
Yes: Słupca warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Słupca?
The wettest day measured in Słupca between 1940 and 2025 was 10 July 1980, with 64 mm of rain in 24 hours.
What was the windiest day in Słupca?
The windiest day measured in Słupca between 1940 and 2025 was 24 November 1984, with winds reaching 57.6 km/h.
What is the warmest month in Słupca?
The warmest month in Słupca is July (18.8 °C on average); the coldest is January (-1.7 °C).
How much does it rain in Słupca?
Słupca receives on average 590 mm of precipitation per year, spread over about 124 rainy days.
Is it sunny in Słupca?
Słupca gets on average 7.4 hours of sunshine per day, roughly 2,701 hours per year over 1940-2025.
What is the biggest single-day snowfall in Słupca?
The heaviest 24-hour snowfall measured in Słupca between 1940 and 2025 was 26 November 1969, with 13.0 cm.
Are there tropical nights in Słupca?
Yes: Słupca has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Słupca?
In Słupca, between 1940 and 2025, the highest apparent temperature reached 38.5 °C on 8 August 2015, and the lowest was -34.5 °C on 14 January 1987.
Compare Słupca with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Słupca