Climate averages 1991–2020
Białystok weather
in May.
A mild, moderately wet month: the 4th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Białystok: daytime highs average 18.0°C and nights cool to about 8.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 67 mm of rain on roughly 12 days, which makes May a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 49 min on an average May day.
The nearest other city in this atlas is Hrodna (75 km away). In May its highs average 17.6°C, about as warm as Białystok, with 63 mm of rain.
Among the 60 cities listed in Poland, Białystok ranks joint 45th of 60 for the warmest May highs and joint 27th of 60 for the driest May (rainfall, lowest first). The mean May high of those 60 cities is 18.1°C; Białystok is 0.1°C cooler than that mean.
From May to June, average highs rise by 3.3°C to 21.3°C, and monthly rainfall rises from 67 mm to 70 mm.
The annual picture
May in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Białystok climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.6°C-5.1°C | -5.1°C | 39 | 10.4 | 8.28 h |
| February | 0.7°C-4.6°C | -4.6°C | 38 | 9.5 | 9.810 h |
| March | 5.5°C-2.0°C | -2.0°C | 41 | 10.4 | 11.812 h |
| April | 12.5°C3.0°C | 3.0°C | 46 | 9.9 | 13.914 h |
| May, selected | 18.0°C8.4°C | 8.4°C | 67 | 12.0 | 15.816 h |
| June | 21.3°C12.2°C | 12.2°C | 70 | 12.6 | 16.917 h |
| July | 23.3°C14.6°C | 14.6°C | 84 | 13.2 | 16.416 h |
| August | 22.8°C14.1°C | 14.1°C | 68 | 10.4 | 14.815 h |
| September | 17.4°C10.0°C | 10.0°C | 58 | 9.6 | 12.713 h |
| October | 11.1°C5.2°C | 5.2°C | 48 | 9.9 | 10.611 h |
| November | 5.1°C1.1°C | 1.1°C | 41 | 9.7 | 8.79 h |
| December | 0.9°C-3.0°C | -3.0°C | 45 | 10.1 | 7.78 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Hrodna in MayBelarus · 75 kmHigh 17.6°C · Low 8.2°C · 63 mm rain
- Brest in MayBelarus · 120 kmHigh 18.7°C · Low 9.0°C · 73 mm rain
- Siedlce in MayPoland · 123 kmHigh 18.2°C · Low 9.4°C · 70 mm rain
- Lida in MayBelarus · 164 kmHigh 17.4°C · Low 8.3°C · 67 mm rain
- Wawer in MayPoland · 170 kmHigh 18.8°C · Low 9.3°C · 67 mm rain
- Praga Południe in MayPoland · 171 kmHigh 18.9°C · Low 9.3°C · 67 mm rain
- Białołeka in MayPoland · 173 kmHigh 18.8°C · Low 9.2°C · 67 mm rain
- Warsaw in MayPoland · 176 kmHigh 18.7°C · Low 9.2°C · 67 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Białystok) is explained once on the Białystok year overview and on the Sources, method and limits page.