Białystok climate
Białystok (Poland) has a warm-summer humid continental climate (Köppen Dfb). The average temperature over the year is 8 °C46 °F, and about 664 mm26 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Białystok climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | −228 | −817 | −523 | 451.8 | 28 |
| Feb | −131 | −719 | −425 | 371.5 | 26 |
| Mar | 542 | −326 | 134 | 391.5 | 23 |
| Apr | 1355 | 236 | 846 | 391.5 | 9 |
| May | 1966 | 847 | 1456 | 722.9 | 1 |
| Jun | 2272 | 1254 | 1763 | 662.6 | 0 |
| Jul | 2577 | 1558 | 2068 | 873.4 | 0 |
| Aug | 2576 | 1457 | 1967 | 783.1 | 0 |
| Sep | 1966 | 948 | 1457 | 542.1 | 0 |
| Oct | 1153 | 338 | 745 | 532.1 | 6 |
| Nov | 541 | 032 | 337 | 461.8 | 14 |
| Dec | 032 | −523 | −228 | 471.8 | 26 |
| Year | 2577 | −817 | 846 | 66426 | 132 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 96% | 85% | 0.6 | 8:04 |
| Feb | 94% | 83% | 1.3 | 9:45 |
| Mar | 86% | 73% | 2.7 | 11:41 |
| Apr | 78% | 60% | 4.1 | 13:54 |
| May | 76% | 62% | 5.3 | 15:49 |
| Jun | 73% | 62% | 5.7 | 16:55 |
| Jul | 71% | 65% | 5.3 | 16:28 |
| Aug | 69% | 60% | 4.5 | 14:45 |
| Sep | 75% | 62% | 3.1 | 12:35 |
| Oct | 85% | 71% | 1.6 | 10:27 |
| Nov | 93% | 84% | 0.6 | 8:33 |
| Dec | 95% | 83% | 0.4 | 7:34 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Białystok is like
The warmest month is July, with an average high of 25 °C77 °F and a low of 15 °C58 °F. The coldest is January, when highs average −2 °C28 °F and lows −8 °C17 °F. Seasons are strongly marked: the warmest month is on average 25.2 °C45.3 °F warmer than the coldest.
Annual precipitation is moderate at about 664 mm26 in. The wettest three-month stretch is June–August, which brings 35% of the annual total. The wettest month is July (87 mm3.4 in), the driest is February (37 mm1.5 in).
Relative humidity ranges from 69% in August to 96% in January. The clearest skies (lowest average cloud amount, 60%) are typical of August. Average wind speed near the ground ranges from 8 km/h (5 mph) in August to 11 km/h (7 mph) in January. Daylight lasts from about 7.6 hours in December to 16.9 hours in June.
A lasting snow cover is typical in December–March, when the average snow depth in the reanalysis exceeds 10 cm (deepest in January, about 18 cm).
Best time to visit Białystok
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September: average highs of 19 °C66 °F to 25 °C77 °F with 54 mm2.1 in to 87 mm3.4 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of −2 °C28 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Białystok
- Winter (December–February) — highs −228 to 0 °C32 °F, lows −817 to −5 °C23 °F, about 43 mm1.7 in of precipitation a month. Pack a winter coat, hat, gloves and warm, non-slip boots and shoes with good grip, as frost is common.
- Spring (March–May) — highs 542 to 19 °C66 °F, lows −326 to 8 °C47 °F, about 50 mm2.0 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 2272 to 25 °C77 °F, lows 1254 to 15 °C58 °F, about 77 mm3.0 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 541 to 19 °C66 °F, lows 032 to 9 °C48 °F, about 51 mm2.0 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How Białystok compares
Compared with Hrodna, about 75 km to the northeast, Białystok is on average 0.4 °C0.7 °F warmer and receives a similar amount of precipitation. The difference is largest in August (0.7 °C1.2 °F warmer).
Of the 36 places in Poland covered by World Climates, Białystok is the 34th warmest by annual mean temperature and the 17th wettest by annual precipitation. See all of them on the Poland climate page.
Places in other countries with the most similar temperature and rainfall pattern: Hrodna (Belarus, Dfb), Pinsk (Belarus, Dfb) and Ternopil (Ukraine, Dfb).
Nearby places
- Hrodna 75 km · 7 °C45 °F · 676 mm27 in
- Brest 120 km · 8 °C47 °F · 640 mm25 in
- Lida 164 km · 7 °C44 °F · 724 mm28 in
- Targówek 170 km · 9 °C47 °F · 623 mm25 in
- Białołeka 173 km · 9 °C48 °F · 623 mm25 in
- Warsaw 176 km · 9 °C48 °F · 629 mm25 in
- Bielany 177 km · 9 °C47 °F · 613 mm24 in
- Wola 179 km · 9 °C48 °F · 629 mm25 in
Frequently asked questions
What is the warmest month in Białystok?
July is the warmest month in Białystok, with an average high of 25 °C (77 °F) and an average low of 15 °C (58 °F).
What is the coldest month in Białystok?
January is the coldest month, with an average high of -2 °C (28 °F) and an average low of -8 °C (17 °F).
When does it rain the most in Białystok?
July is the wettest month with about 87 mm (3.4 in) of precipitation; February is the driest with about 37 mm (1.5 in).
What is the best time to visit Białystok?
Judging by long-term averages, the most comfortable months are June–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.