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Winterthur Weather by Month
Average temperatures, rainfall and humidity for Winterthur, Switzerland, month by month, built from OpenWeather’s historical records. Use it to see what a typical Winterthur month looks like before you travel — then check the live Winterthur forecast for the days ahead.
Warmest month
July
27°C average high
Coolest month
January
0°C average low
Wettest month
August
98 mm of rain
Driest month
February
44 mm of rain
Average temperature and rainfall in Winterthur 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 | 5°C | 0°C | -16°C / 17°C | 85 mm | 84% | 10 km/h |
| February | 8°C | 1°C | -13°C / 21°C | 44 mm | 79% | 10 km/h |
| March | 12°C | 2°C | -8°C / 25°C | 58 mm | 72% | 10 km/h |
| April | 16°C | 5°C | -3°C / 28°C | 65 mm | 68% | 10 km/h |
| May | 19°C | 9°C | 0°C / 33°C | 86 mm | 72% | 9 km/h |
| June | 25°C | 14°C | 6°C / 39°C | 82 mm | 69% | 8 km/h |
| July | 27°C | 16°C | 5°C / 41°C | 59 mm | 66% | 8 km/h |
| August | 26°C | 15°C | 5°C / 38°C | 98 mm | 70% | 8 km/h |
| September | 22°C | 11°C | 3°C / 32°C | 93 mm | 77% | 8 km/h |
| October | 16°C | 8°C | -2°C / 28°C | 72 mm | 83% | 8 km/h |
| November | 10°C | 4°C | -7°C / 22°C | 86 mm | 85% | 9 km/h |
| December | 6°C | 1°C | -19°C / 16°C | 84 mm | 86% | 10 km/h |
Best time to visit Winterthur
The most comfortable time to visit Winterthur is generally June to July and September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around August, totalling about 911 mm a year.
Travellers who prefer heat should aim for July, when highs average 27°C. August is the month to avoid if rain would spoil your plans — it averages 98 mm, roughly 2× the rainfall of the driest month (February).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Winterthur forecast for what is happening now.