Sierpc climate — normals and trends
Sierpc (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.0 °C and it receives 623 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 (-2.6 °C). Rainfall peaks in July.
Sierpc averages 102 frost days, 3 hot days (≥ 30 °C) and 129 rainy days per year.
Sierpc has warmed by +2.3 °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 120 to 84 per year over the period.
The hottest day of the period reached 36.6 °C (on 22 August 1943) and the coldest -30.5 °C (on 30 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
SierpcMazovia
- coords
- 52.86°, 19.67°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.0°C
Average daily high
11.5°C
Average daily low
4.5°C
Annual rainfall
623mm
Sunshine / day
7.3h
Mean relative humidity
79%
Average peak wind
18.7km/h
Seasonal range
20.8°C
Frost days (< 0 °C)
102 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
129 d/yr
Annual snowfall
60.2 cm
Average feels-like high
8.8 °C
Average feels-like low
1.2 °C
Average peak gust
36.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °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
36.6 °C
22 August 1943
Coldest day
-30.5 °C
30 January 1987
Wettest day
56 mm
3 September 1995
Windiest day
53.5 km/h
2 November 1981
Strongest gust
112.7 km/h
24 November 1984
Hottest feels-like
37.2 °C
11 July 1959
Coldest feels-like
-35.8 °C
30 January 1987
Snowiest day
17.8 cm
1 November 1941
Sunniest day
16.1 h
18 June 2021
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 4.1 °C | +4.6 °C | 48 mm | +9 mm |
| Feb | 2.3 °C | +1.4 °C | 7 mm | -31 mm |
| Mar | 11.3 °C | +5.8 °C | 28 mm | -10 mm |
| Apr | 16.1 °C | +4.0 °C | 34 mm | -11 mm |
| May | 15.5 °C | -2.0 °C | 70 mm | +7 mm |
| Jun | 22.1 °C | +1.2 °C | 57 mm | -11 mm |
| Jul | 23.2 °C | +0.6 °C | 134 mm | +50 mm |
| Aug | 23.2 °C | +0.8 °C | 42 mm | -23 mm |
| Sep | 19.8 °C | +2.0 °C | 72 mm | +22 mm |
| Oct | 11.6 °C | -0.3 °C | 66 mm | +24 mm |
| Nov | 5.9 °C | +0.5 °C | 54 mm | +8 mm |
| Dec | 3.7 °C | +2.2 °C | 21 mm | -24 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 Sierpc?
Sierpc has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.0 °C and it receives 623 mm of precipitation per year.
What is the hottest day ever recorded in Sierpc?
The hottest day measured in Sierpc between 1940 and 2025 was 22 August 1943, reaching 36.6 °C.
What is the coldest day in Sierpc?
The coldest day measured in Sierpc between 1940 and 2025 was 30 January 1987, at -30.5 °C.
Does it snow in Sierpc?
Yes. Sierpc gets on average 60.2 cm of snow per year and has around 102 frost days.
Has the climate of Sierpc warmed?
Yes: Sierpc warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sierpc?
The wettest day measured in Sierpc between 1940 and 2025 was 3 September 1995, with 56 mm of rain in 24 hours.
What was the windiest day in Sierpc?
The windiest day measured in Sierpc between 1940 and 2025 was 2 November 1981, with winds reaching 53.5 km/h.
What is the warmest month in Sierpc?
The warmest month in Sierpc is July (18.2 °C on average); the coldest is January (-2.6 °C).
How much does it rain in Sierpc?
Sierpc receives on average 623 mm of precipitation per year, spread over about 129 rainy days.
Is it sunny in Sierpc?
Sierpc 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 Sierpc?
The heaviest 24-hour snowfall measured in Sierpc between 1940 and 2025 was 1 November 1941, with 17.8 cm.
Are there tropical nights in Sierpc?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Sierpc.
What was the most extreme apparent temperature in Sierpc?
In Sierpc, between 1940 and 2025, the highest apparent temperature reached 37.2 °C on 11 July 1959, and the lowest was -35.8 °C on 30 January 1987.
Compare Sierpc with another city
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Nearby cities
The climate around Sierpc