Bialystok climate by month
Averages and records for each calendar month at Bialystok, Poland, from 1952 to 2026. The warmest month is July, averaging 23.6°C; the coolest is January at −0.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −0.5°C | −4.2°C | 15.9°C1 January 2023 | −34.6°C30 January 1987 | 31 / 66 |
| February | 0.9°C | −8.6°C | 16.4°C21 February 1990 | −31.1°C1 February 1956 | 29 / 66 |
| March | 5.7°C | −4.5°C | 20.3°C21 March 2014 | −23.6°C3 March 1987 | 60 / 66 |
| April | 12.8°C | 1.5°C | 29.3°C30 April 2012 | −8.0°C23 April 1981 | 62 / 66 |
| May | 18.7°C | 6.6°C | 31.1°C29 May 2005 | −5.0°C5 May 1980 | 64 / 66 |
| June | 22.0°C | 10.3°C | 35.7°C28 June 2026 | −0.2°C3 June 1991 | 61 / 66 |
| July | 23.6°C | 11.9°C | 36.1°C12 July 1959 | −1.1°C3 July 1990 | 64 / 66 |
| August | 23.1°C | 11.2°C | 35.2°C29 August 1992 | 0.1°C27 August 1984 | 64 / 66 |
| September | 18.0°C | 7.7°C | 33.6°C1 September 2015 | −5.1°C27 September 1986 | 62 / 66 |
| October | 11.8°C | 3.1°C | 23.9°C2 October 1956 | −11.1°C31 October 1956 | 59 / 65 |
| November | 5.1°C | −0.2°C | 18.5°C6 November 2014 | −19.2°C22 November 1998 | 36 / 65 |
| December | 1.6°C | −2.2°C | 13.9°C5 December 1961 | −29.0°C27 December 1996 | 24 / 65 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 24 to 64 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.