Weatheo

Olsztyn Weather by Month

Average temperatures, rainfall and humidity for Olsztyn, Poland, month by month, built from OpenWeather’s historical records. Use it to see what a typical Olsztyn month looks like before you travel — then check the live Olsztyn forecast for the days ahead.

Warmest month

August

24°C average high

Coolest month

January

-4°C average low

Wettest month

July

71 mm of rain

Driest month

January

24 mm of rain

Average temperature and rainfall in Olsztyn by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January1°C-4°C-24°C / 15°C
24 mm
89%16 km/h
February3°C-3°C-25°C / 13°C
29 mm
86%15 km/h
March7°C-1°C-18°C / 23°C
40 mm
76%14 km/h
April13°C2°C-8°C / 28°C
44 mm
70%15 km/h
May18°C7°C-5°C / 29°C
45 mm
69%13 km/h
June23°C11°C0°C / 37°C
46 mm
71%12 km/h
July23°C13°C4°C / 34°C
71 mm
75%12 km/h
August24°C13°C5°C / 35°C
40 mm
72%11 km/h
September19°C9°C-3°C / 36°C
39 mm
75%13 km/h
October13°C5°C-5°C / 24°C
46 mm
82%15 km/h
November7°C2°C-12°C / 16°C
41 mm
89%14 km/h
December3°C-1°C-19°C / 14°C
38 mm
90%16 km/h

Best time to visit Olsztyn

The most comfortable time to visit Olsztyn is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around July, totalling about 502 mm a year.

Travellers who prefer heat should aim for August, when highs average 24°C. July is the month to avoid if rain would spoil your plans — it averages 71 mm, roughly 3× the rainfall of the driest month (January).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Olsztyn forecast for what is happening now.

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