Białystok climate
Białystok is warmest in July, with average highs of 23 °C, and coldest in January, when nights average -5.2 °C. July is the wettest month (86 mm) and February the driest (38 mm). Figures are 1991–2020 climate normals.
Across a full year Białystok averages 658 mm of rain, 27 days above 25 °C and 111 days below freezing.
Poland · population 295,683 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month July 23 °C
- Coldest month January -5.2 °C
- Driest month February 38 mm
- Wettest month July 86 mm
- Least cloud August 57 % cloud
- Hottest on record August 34 °C
- Coldest on record December -31 °C
What to expectBiałystok through the year
Białystok has a clear annual cycle: average daily highs run from -0.6 °C in January to 23 °C in July, a swing of 22 °C in mean temperature across the year.
Counted across a normal year, 27 days a year reach 25 °C, 3 of them reach 30 °C, 111 nights drop below freezing. The warmest reading in the 1991–2020 record is 34 °C, in August.
Rain is strongly seasonal. July averages 86 mm against 38 mm in February — 2.3 times as much. Planning around the dry months matters more here than planning around temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | -0.6 °C | 41 mm | 83 % |
| February | 0.7 °C | 38 mm | 80 % |
| March | 5.5 °C | 42 mm | 71 % |
| April | 12.6 °C | 46 mm | 61 % |
| May | 18.0 °C | 68 mm | 59 % |
| June | 21.3 °C | 73 mm | 60 % |
| July | 23.3 °C | 86 mm | 58 % |
| August | 22.8 °C | 68 mm | 57 % |
| September | 17.4 °C | 59 mm | 64 % |
| October | 11.2 °C | 50 mm | 69 % |
| November | 5.1 °C | 42 mm | 83 % |
| December | 0.9 °C | 46 mm | 84 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | -0.6 °C | -5.2 °C | -2.8 °C | 11.0 °C | -28.2 °C | 0 | 0 | 24 |
| February | 0.7 °C | -4.7 °C | -1.9 °C | 12.6 °C | -30.9 °C | 0 | 0 | 22 |
| March | 5.5 °C | -2.2 °C | 1.7 °C | 17.4 °C | -21.2 °C | 0 | 0 | 20 |
| April | 12.6 °C | 2.9 °C | 8.0 °C | 26.2 °C | -10.8 °C | 0 | 0 | 7 |
| May | 18.0 °C | 8.3 °C | 13.6 °C | 30.5 °C | -2.3 °C | 2 | 0 | 0 |
| June | 21.3 °C | 12.0 °C | 17.1 °C | 32.7 °C | 3.9 °C | 6 | 0 | 0 |
| July | 23.3 °C | 14.4 °C | 19.2 °C | 33.9 °C | 7.8 °C | 10 | 1 | 0 |
| August | 22.8 °C | 14.0 °C | 18.6 °C | 34.4 °C | 6.6 °C | 8 | 1 | 0 |
| September | 17.4 °C | 9.8 °C | 13.6 °C | 32.5 °C | 1.3 °C | 1 | 0 | 0 |
| October | 11.2 °C | 5.1 °C | 8.0 °C | 22.7 °C | -8.1 °C | 0 | 0 | 4 |
| November | 5.1 °C | 1.0 °C | 3.1 °C | 17.1 °C | -21.3 °C | 0 | 0 | 11 |
| December | 0.9 °C | -3.1 °C | -1.0 °C | 11.0 °C | -31.2 °C | 0 | 0 | 21 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 41 mm | 10 | 8.1 h/day | 83 % | 86 % | 19 km/h |
| February | 38 mm | 9 | 9.8 h/day | 80 % | 84 % | 19 km/h |
| March | 42 mm | 10 | 12 h/day | 71 % | 78 % | 19 km/h |
| April | 46 mm | 10 | 14 h/day | 61 % | 71 % | 18 km/h |
| May | 68 mm | 12 | 16 h/day | 59 % | 70 % | 17 km/h |
| June | 73 mm | 12 | 17 h/day | 60 % | 70 % | 17 km/h |
| July | 86 mm | 13 | 16 h/day | 58 % | 72 % | 16 km/h |
| August | 68 mm | 10 | 15 h/day | 57 % | 71 % | 16 km/h |
| September | 59 mm | 9 | 13 h/day | 64 % | 77 % | 17 km/h |
| October | 50 mm | 10 | 11 h/day | 69 % | 82 % | 18 km/h |
| November | 42 mm | 10 | 8.7 h/day | 83 % | 86 % | 18 km/h |
| December | 46 mm | 10 | 7.6 h/day | 84 % | 87 % | 19 km/h |
How Białystok compares
The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.
| Destination | Summer high | Winter low | Rain per year | Days above 25 °C |
|---|---|---|---|---|
| Białystok | 23 °C | -5.2 °C | 658 mm | 27 |
| Hrodna · Belarus | 23 °C | -5.3 °C | 654 mm | 24 |
| Brest · Belarus | 24 °C | -5.2 °C | 642 mm | 35 |
| Warsaw · Poland | 24 °C | -4.0 °C | 645 mm | 34 |
Planning a trip? See the best time to visit Białystok.
QuestionsCommon questions about Białystok’s climate
When is the best time to visit Białystok?
That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, July is the warmest month and February the driest. The month-by-month table above has the full picture.
How hot does Białystok get?
In July, the warmest month, daily highs average 23 °C. About 3 days a year pass 30 °C. The highest value in the 1991–2020 record is 34 °C.
How cold does it get in winter?
Nights average -5.2 °C in January, the coldest month. A normal year has 111 nights below freezing.
Which month is wettest in Białystok?
July, averaging 86 mm over 13 days with rain. The driest month is February with 38 mm. The year as a whole averages 658 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Białystok rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.