Common information
CountryPoland
Population291 855
Weather, climate, temperature by months in Bialystok
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 28 | 22 | 12 | 11 | 12 | 16 | 20 | 24 | 30 | 30 | 33 | 32 | 33 |
| Average high, °C | 16 | 10 | 3 | 0 | -1 | 0 | 4 | 11 | 17 | 20 | 21 | 21 | 10 |
| Average temperature, °C | 12 | 7 | 2 | -1 | -3 | -3 | 1 | 6 | 12 | 15 | 16 | 16 | 7 |
| Average low, °C | 7 | 3 | 0 | -3 | -6 | -6 | -2 | 1 | 7 | 10 | 12 | 11 | 3 |
| Record low, °C | -4 | -10 | -16 | -26 | -34 | -25 | -23 | -7 | -3 | 1 | 5 | 2 | -34 |
| Rain, days | 12 | 11 | 13 | 11 | 8 | 4 | 9 | 10 | 11 | 12 | 12 | 10 | 123 |
| Snow, days | 0 | 1 | 6 | 13 | 16 | 12 | 8 | 3 | 0 | 0 | 0 | 0 | 59 |
| Fog, days | 23 | 25 | 23 | 24 | 22 | 21 | 22 | 21 | 19 | 19 | 20 | 24 | 263 |
| Thunderstorms, days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 5 | 5 | 3 | 19 |
| Average precipitation, mm. | 50 | 40 | 40 | 40 | 30 | 20 | 30 | 30 | 50 | 70 | 70 | 70 | 540 |
| Relative humidity, % | 85 | 85 | 90 | 95 | 90 | 90 | 80 | 70 | 70 | 75 | 75 | 75 | 82 |
| Relative humidity morning, % | 92 | 92 | 92 | 91 | 89 | 89 | 89 | 83 | 78 | 81 | 84 | 88 | 87 |
| Relative humidity evening, % | 69 | 78 | 87 | 88 | 85 | 80 | 70 | 59 | 57 | 62 | 64 | 62 | 72 |
| Wind speed, km/h | 9 | 12 | 9 | 16 | 14 | 16 | 14 | 14 | 9 | 9 | 9 | 9 | 12 |
| Monthly sunshine, часов | 174 | 94 | 38 | 29 | 39 | 59 | 140 | 177 | 235 | 261 | 262 | 240 | 1748 |
| Day Length, часов | 13 | 11 | 9 | 8 | 9 | 11 | 13 | 15 | 17 | 18 | 17 | 15 | 13 |
| Dew point, °C | 8 | 4 | 0 | -3 | -5 | -5 | -2 | 1 | 7 | 11 | 12 | 12 | 40 |
| Growing degree-day, °C | 58 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 69 | 150 | 207 | 189 | 673 |
| Solar radiation, global, Mj/m2 | 10 | 6 | 3 | 2 | 3 | 6 | 9 | 13 | 18 | 18 | 17 | 16 | 10 |