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Västerås Weather by Month
Average temperatures, rainfall and humidity for Västerås, Sweden, month by month, built from OpenWeather's historical records. Use it to see what a typical Västerås month looks like before you travel — then check the live Västerås forecast for the days ahead.
Warmest month
July
23°C average high
Coolest month
January
-5°C average low
Wettest month
August
48 mm of rain
Driest month
February
14 mm of rain
Average temperature and rainfall in Västerås by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 0°C | -5°C | -26°C / 10°C | 17 mm | 84% | 14 km/h |
| February | 2°C | -4°C | -19°C / 12°C | 14 mm | 81% | 13 km/h |
| March | 6°C | -2°C | -19°C / 19°C | 28 mm | 74% | 13 km/h |
| April | 11°C | 0°C | -9°C / 22°C | 24 mm | 64% | 13 km/h |
| May | 16°C | 6°C | -6°C / 28°C | 37 mm | 64% | 13 km/h |
| June | 21°C | 11°C | 1°C / 31°C | 40 mm | 65% | 12 km/h |
| July | 23°C | 13°C | 5°C / 35°C | 47 mm | 68% | 12 km/h |
| August | 22°C | 12°C | 3°C / 34°C | 48 mm | 71% | 12 km/h |
| September | 17°C | 8°C | -2°C / 28°C | 37 mm | 77% | 12 km/h |
| October | 11°C | 4°C | -7°C / 19°C | 40 mm | 82% | 13 km/h |
| November | 6°C | 1°C | -14°C / 16°C | 33 mm | 86% | 13 km/h |
| December | 2°C | -3°C | -22°C / 13°C | 26 mm | 86% | 13 km/h |
Best time to visit Västerås
The most comfortable time to visit Västerås is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around August, totalling about 390 mm a year.
Travellers who prefer heat should aim for July, when highs average 23°C. August is the month to avoid if rain would spoil your plans — it averages 48 mm, roughly 3× the rainfall of February.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Västerås forecast for what is happening now.