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Białystok Weather by Month
Average temperatures, rainfall and humidity for Białystok, Poland, month by month, built from OpenWeather’s historical records. Use it to see what a typical Białystok month looks like before you travel — then check the live Białystok forecast for the days ahead.
Warmest month
August
27°C average high
Coolest month
January
-5°C average low
Wettest month
May
64 mm of rain
Driest month
January
20 mm of rain
Average temperature and rainfall in Białystok by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 1°C | -5°C | -27°C / 16°C | 20 mm | 89% | 15 km/h |
| February | 3°C | -3°C | -21°C / 13°C | 30 mm | 85% | 15 km/h |
| March | 8°C | -1°C | -19°C / 25°C | 39 mm | 75% | 14 km/h |
| April | 14°C | 3°C | -6°C / 31°C | 32 mm | 67% | 15 km/h |
| May | 20°C | 8°C | -3°C / 36°C | 64 mm | 66% | 14 km/h |
| June | 25°C | 13°C | 3°C / 39°C | 42 mm | 68% | 13 km/h |
| July | 26°C | 14°C | 7°C / 45°C | 60 mm | 71% | 12 km/h |
| August | 27°C | 14°C | 5°C / 44°C | 46 mm | 69% | 10 km/h |
| September | 21°C | 10°C | 1°C / 43°C | 37 mm | 75% | 12 km/h |
| October | 13°C | 5°C | -8°C / 35°C | 39 mm | 83% | 13 km/h |
| November | 6°C | 1°C | -14°C / 18°C | 32 mm | 89% | 13 km/h |
| December | 3°C | -2°C | -18°C / 13°C | 35 mm | 90% | 14 km/h |
Best time to visit Białystok
The most comfortable time to visit Białystok 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 May, totalling about 476 mm a year.
Travellers who prefer heat should aim for August, when highs average 27°C. May is the month to avoid if rain would spoil your plans — it averages 64 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 Białystok forecast for what is happening now.