Västerås weather by month
Measured at Stockholm/Västerås Arpt
Averages and records for each calendar month at Stockholm/Västerås Arpt, Sweden, from 1882 to 2026. The warmest month is July, averaging 22.8°C; the coolest is January at −0.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −0.7°C | −6.4°C | 11.0°C25 January 1882 | −31.0°C14 January 1918 | 142 / 142 |
| February | −0.3°C | −6.7°C | 12.4°C28 February 2021 | −31.8°C16 February 1979 | 142 / 142 |
| March | 3.5°C | −4.1°C | 19.4°C26 March 2017 | −28.0°C6 March 1888 | 142 / 142 |
| April | 9.5°C | 0.1°C | 25.9°C27 April 1993 | −17.2°C1 April 1944 | 142 / 142 |
| May | 16.2°C | 5.0°C | 29.5°C16 May 1894 | −6.0°C1 May 1918 | 140 / 142 |
| June | 20.7°C | 9.8°C | 35.0°C30 June 1947 | −1.4°C8 June 1941 | 141 / 142 |
| July | 22.8°C | 12.3°C | 36.0°C9 July 1933 | 2.0°C8 July 1908 | 140 / 142 |
| August | 20.9°C | 11.3°C | 35.2°C7 August 1975 | 0.0°C25 August 1889 | 141 / 142 |
| September | 15.8°C | 7.5°C | 27.8°C5 September 2024 | −7.0°C30 September 2001 | 141 / 142 |
| October | 9.6°C | 3.3°C | 21.0°C3 October 1898 | −12.0°C30 October 1911 | 141 / 142 |
| November | 4.0°C | −0.8°C | 15.9°C3 November 2020 | −19.0°C30 November 1904 | 142 / 142 |
| December | 0.8°C | −4.3°C | 12.1°C20 December 2015 | −27.0°C26 December 1927 | 143 / 143 |
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 140 to 143 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
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.