Monthly climate guide
Białystok weather in May
With highs near 19°C (66°F) and lows around 8°C (46°F), May feels mild in Białystok. Rainfall averages about 75 mm (some rain) and the sky is often cloudy. Daytime highs are 6°C warmer than April and 4°C cooler than June.
What stands out in May
- Just 330 km apart, but Białystok runs about 4°C warmer than Gdańsk this month.
- May brings late spring to Białystok.
- Afternoons and nights feel like different seasons, roughly 11°C apart.
- It warms up quickly from here: by June highs are about 4°C higher.
Avg high
19°C
66°F
Avg low
8°C
46°F
Rainfall
75 mm
some rain
Humidity
77%
relative
Sky
61%
cloud · often cloudy
Białystok weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | -2°C / 28°F | -7°C / 19°F | 43 mm | 95% | 90% |
| February | 0°C / 32°F | -6°C / 21°F | 35 mm | 93% | 84% |
| March | 6°C / 44°F | -2°C / 28°F | 38 mm | 85% | 72% |
| April | 13°C / 56°F | 2°C / 36°F | 44 mm | 79% | 60% |
| May | 19°C / 66°F | 8°C / 46°F | 75 mm | 77% | 61% |
| June | 23°C / 73°F | 12°C / 54°F | 69 mm | 74% | 61% |
| July | 24°C / 76°F | 14°C / 57°F | 99 mm | 73% | 66% |
| August | 25°C / 77°F | 14°C / 57°F | 66 mm | 69% | 59% |
| September | 20°C / 67°F | 9°C / 49°F | 55 mm | 75% | 63% |
| October | 12°C / 54°F | 4°C / 39°F | 58 mm | 84% | 71% |
| November | 5°C / 42°F | 1°C / 33°F | 41 mm | 93% | 85% |
| December | 1°C / 34°F | -3°C / 26°F | 50 mm | 95% | 84% |
What to pack for May
- A warm sweater or fleece for layering
- A mid-weight jacket
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is May a good time to visit Białystok?
Compare the months in the chart above to find your ideal window.
Best time to visit Białystok →Other Poland cities in May
Cite or embed this data
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Białystok weather in May. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/poland/bialystok/may
<a href="https://weathercompare.eu/weather/poland/bialystok/may">Białystok weather in May</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/poland/bialystok" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Białystok weather in May"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/poland/bialystok/may">Białystok weather in May</a> – WeatherCompare</p>
Białystok in May: quick answers
Is May a good time to visit Białystok?
Yes. May is one of the best months for Białystok, with highs around 19°C and about 75 mm of rain.
How warm is Białystok in May?
Average highs are about 19°C (66°F) and average lows about 8°C (46°F), based on 10 years of daily data.
Does it rain a lot in Białystok in May?
Białystok typically gets around 75 mm of rain in May — some rain.
Figures are long-term averages for the area around Białystok (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.