Siedlce climate — normals and trends
Siedlce (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.8 °C and it receives 646 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 (18.5 °C on average) and the coldest is January (-3.4 °C). Rainfall peaks in July.
Siedlce averages 109 frost days, 4 hot days (≥ 30 °C) and 132 rainy days per year.
Siedlce 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 127 to 91 per year over the period.
The hottest day of the period reached 35.1 °C (on 29 August 1992) and the coldest -33.3 °C (on 11 January 1950).
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
SiedlceMazovia
- coords
- 52.17°, 22.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.8°C
Average daily high
11.4°C
Average daily low
4.1°C
Annual rainfall
646mm
Sunshine / day
7.2h
Mean relative humidity
79%
Average peak wind
17.9km/h
Seasonal range
21.9°C
Frost days (< 0 °C)
109 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
132 d/yr
Annual snowfall
71.9 cm
Average feels-like high
8.6 °C
Average feels-like low
0.9 °C
Average peak gust
35.9 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
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.44 · 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
35.1 °C
29 August 1992
Coldest day
-33.3 °C
11 January 1950
Wettest day
46 mm
1 September 2010
Windiest day
52.7 km/h
3 November 1981
Strongest gust
113.0 km/h
7 March 1983
Hottest feels-like
36.9 °C
11 July 2024
Coldest feels-like
-38.3 °C
11 January 1950
Snowiest day
21.2 cm
30 January 1979
Sunniest day
15.7 h
24 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 | 4.1 °C | +5.3 °C | 39 mm | -2 mm |
| Feb | 1.7 °C | +1.4 °C | 14 mm | -26 mm |
| Mar | 11.3 °C | +6.3 °C | 37 mm | -2 mm |
| Apr | 16.2 °C | +4.1 °C | 26 mm | -23 mm |
| May | 15.7 °C | -2.1 °C | 67 mm | +3 mm |
| Jun | 22.8 °C | +1.5 °C | 55 mm | -20 mm |
| Jul | 24.3 °C | +1.3 °C | 125 mm | +43 mm |
| Aug | 24.4 °C | +1.8 °C | 28 mm | -42 mm |
| Sep | 20.6 °C | +2.8 °C | 51 mm | -4 mm |
| Oct | 11.3 °C | -0.3 °C | 57 mm | +13 mm |
| Nov | 6.3 °C | +1.3 °C | 46 mm | +1 mm |
| Dec | 3.6 °C | +2.7 °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 Siedlce?
Siedlce has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.8 °C and it receives 646 mm of precipitation per year.
What is the hottest day ever recorded in Siedlce?
The hottest day measured in Siedlce between 1940 and 2025 was 29 August 1992, reaching 35.1 °C.
What is the coldest day in Siedlce?
The coldest day measured in Siedlce between 1940 and 2025 was 11 January 1950, at -33.3 °C.
Does it snow in Siedlce?
Yes. Siedlce gets on average 71.9 cm of snow per year and has around 109 frost days.
Has the climate of Siedlce warmed?
Yes: Siedlce warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Siedlce?
The wettest day measured in Siedlce between 1940 and 2025 was 1 September 2010, with 46 mm of rain in 24 hours.
What was the windiest day in Siedlce?
The windiest day measured in Siedlce between 1940 and 2025 was 3 November 1981, with winds reaching 52.7 km/h.
What is the warmest month in Siedlce?
The warmest month in Siedlce is July (18.5 °C on average); the coldest is January (-3.4 °C).
How much does it rain in Siedlce?
Siedlce receives on average 646 mm of precipitation per year, spread over about 132 rainy days.
Is it sunny in Siedlce?
Siedlce gets on average 7.2 hours of sunshine per day, roughly 2,628 hours per year over 1940-2025.
What is the biggest single-day snowfall in Siedlce?
The heaviest 24-hour snowfall measured in Siedlce between 1940 and 2025 was 30 January 1979, with 21.2 cm.
Are there tropical nights in Siedlce?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Siedlce.
What was the most extreme apparent temperature in Siedlce?
In Siedlce, between 1940 and 2025, the highest apparent temperature reached 36.9 °C on 11 July 2024, and the lowest was -38.3 °C on 11 January 1950.
Compare Siedlce with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Siedlce