Otwock climate — normals and trends
Otwock (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.4 °C and it receives 641 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 (19.0 °C on average) and the coldest is January (-2.6 °C). Rainfall peaks in July.
Otwock averages 99 frost days, 5 hot days (≥ 30 °C) and 131 rainy days per year.
Otwock 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 118 to 80 per year over the period.
The hottest day of the period reached 36.3 °C (on 29 August 1992) and the coldest -31.0 °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
OtwockMazovia
- coords
- 52.11°, 21.26°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.4°C
Average daily high
12.1°C
Average daily low
4.7°C
Annual rainfall
641mm
Sunshine / day
7.3h
Mean relative humidity
77%
Average peak wind
17.0km/h
Seasonal range
21.6°C
Frost days (< 0 °C)
99 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
61.9 cm
Average feels-like high
9.5 °C
Average feels-like low
1.7 °C
Average peak gust
35.1 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.44 · 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
36.3 °C
29 August 1992
Coldest day
-31.0 °C
11 January 1940
Wettest day
68 mm
6 August 2006
Windiest day
48.9 km/h
3 November 1981
Strongest gust
110.5 km/h
24 November 1984
Hottest feels-like
37.3 °C
1 August 1994
Coldest feels-like
-36.3 °C
11 January 1940
Snowiest day
23.3 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 | 4.6 °C | +5.0 °C | 43 mm | +3 mm |
| Feb | 2.5 °C | +1.2 °C | 16 mm | -24 mm |
| Mar | 11.9 °C | +5.9 °C | 29 mm | -9 mm |
| Apr | 16.7 °C | +3.9 °C | 25 mm | -23 mm |
| May | 16.1 °C | -2.4 °C | 74 mm | +11 mm |
| Jun | 23.1 °C | +1.2 °C | 57 mm | -15 mm |
| Jul | 24.7 °C | +1.2 °C | 95 mm | +13 mm |
| Aug | 24.9 °C | +1.7 °C | 32 mm | -38 mm |
| Sep | 20.6 °C | +2.2 °C | 68 mm | +15 mm |
| Oct | 12.0 °C | -0.4 °C | 55 mm | +12 mm |
| Nov | 6.7 °C | +0.9 °C | 48 mm | +1 mm |
| Dec | 3.9 °C | +2.3 °C | 19 mm | -26 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 Otwock?
Otwock has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.4 °C and it receives 641 mm of precipitation per year.
What is the hottest day ever recorded in Otwock?
The hottest day measured in Otwock between 1940 and 2025 was 29 August 1992, reaching 36.3 °C.
What is the coldest day in Otwock?
The coldest day measured in Otwock between 1940 and 2025 was 11 January 1940, at -31.0 °C.
Does it snow in Otwock?
Yes. Otwock gets on average 61.9 cm of snow per year and has around 99 frost days.
Has the climate of Otwock warmed?
Yes: Otwock warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Otwock?
The wettest day measured in Otwock between 1940 and 2025 was 6 August 2006, with 68 mm of rain in 24 hours.
What was the windiest day in Otwock?
The windiest day measured in Otwock between 1940 and 2025 was 3 November 1981, with winds reaching 48.9 km/h.
What is the warmest month in Otwock?
The warmest month in Otwock is July (19.0 °C on average); the coldest is January (-2.6 °C).
How much does it rain in Otwock?
Otwock receives on average 641 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Otwock?
Otwock 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 Otwock?
The heaviest 24-hour snowfall measured in Otwock between 1940 and 2025 was 30 January 1979, with 23.3 cm.
Are there tropical nights in Otwock?
Yes: Otwock has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Otwock?
In Otwock, between 1940 and 2025, the highest apparent temperature reached 37.3 °C on 1 August 1994, and the lowest was -36.3 °C on 11 January 1940.
Compare Otwock with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Otwock