Ostróda climate — normals and trends
Ostróda (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.4 °C and it receives 673 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 (17.6 °C on average) and the coldest is January (-3.1 °C). Rainfall peaks in July.
Ostróda averages 107 frost days, 2 hot days (≥ 30 °C) and 138 rainy days per year.
Ostróda 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 127 to 87 per year over the period.
The hottest day of the period reached 34.9 °C (on 10 August 1992) and the coldest -31.3 °C (on 31 January 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
OstródaWarmia-Masuria
- coords
- 53.70°, 19.96°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.4°C
Average daily high
10.7°C
Average daily low
4.1°C
Annual rainfall
673mm
Sunshine / day
7.2h
Mean relative humidity
81%
Average peak wind
19.4km/h
Seasonal range
20.7°C
Frost days (< 0 °C)
107 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
138 d/yr
Annual snowfall
71.3 cm
Average feels-like high
7.9 °C
Average feels-like low
0.7 °C
Average peak gust
37.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.2 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
34.9 °C
10 August 1992
Coldest day
-31.3 °C
31 January 1956
Wettest day
54 mm
7 September 1992
Windiest day
55.1 km/h
17 January 1955
Strongest gust
114.1 km/h
18 November 2004
Hottest feels-like
36.0 °C
29 July 2013
Coldest feels-like
-37.2 °C
31 January 1956
Snowiest day
13.5 cm
31 March 1984
Sunniest day
16.2 h
20 June 2024
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 | 3.7 °C | +4.8 °C | 63 mm | +19 mm |
| Feb | 1.6 °C | +1.5 °C | 16 mm | -24 mm |
| Mar | 10.3 °C | +5.8 °C | 25 mm | -16 mm |
| Apr | 14.8 °C | +3.7 °C | 22 mm | -23 mm |
| May | 14.6 °C | -2.1 °C | 72 mm | +8 mm |
| Jun | 20.6 °C | +0.6 °C | 70 mm | -3 mm |
| Jul | 22.2 °C | +0.5 °C | 149 mm | +60 mm |
| Aug | 21.6 °C | +0.1 °C | 71 mm | -1 mm |
| Sep | 19.1 °C | +2.0 °C | 102 mm | +45 mm |
| Oct | 11.2 °C | -0.1 °C | 72 mm | +24 mm |
| Nov | 5.3 °C | +0.4 °C | 52 mm | +2 mm |
| Dec | 3.9 °C | +2.8 °C | 31 mm | -20 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 Ostróda?
Ostróda has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.4 °C and it receives 673 mm of precipitation per year.
What is the hottest day ever recorded in Ostróda?
The hottest day measured in Ostróda between 1940 and 2025 was 10 August 1992, reaching 34.9 °C.
What is the coldest day in Ostróda?
The coldest day measured in Ostróda between 1940 and 2025 was 31 January 1956, at -31.3 °C.
Does it snow in Ostróda?
Yes. Ostróda gets on average 71.3 cm of snow per year and has around 107 frost days.
Has the climate of Ostróda warmed?
Yes: Ostróda warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ostróda?
The wettest day measured in Ostróda between 1940 and 2025 was 7 September 1992, with 54 mm of rain in 24 hours.
What was the windiest day in Ostróda?
The windiest day measured in Ostróda between 1940 and 2025 was 17 January 1955, with winds reaching 55.1 km/h.
What is the warmest month in Ostróda?
The warmest month in Ostróda is July (17.6 °C on average); the coldest is January (-3.1 °C).
How much does it rain in Ostróda?
Ostróda receives on average 673 mm of precipitation per year, spread over about 138 rainy days.
Is it sunny in Ostróda?
Ostróda 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 Ostróda?
The heaviest 24-hour snowfall measured in Ostróda between 1940 and 2025 was 31 March 1984, with 13.5 cm.
Are there tropical nights in Ostróda?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ostróda.
What was the most extreme apparent temperature in Ostróda?
In Ostróda, between 1940 and 2025, the highest apparent temperature reached 36.0 °C on 29 July 2013, and the lowest was -37.2 °C on 31 January 1956.
Compare Ostróda with another city
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Nearby cities
The climate around Ostróda