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Basel weather in September 2025
Expect 20°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Basel in September. Check more long-term weather averages for Basel in September before you book your next holiday to Switzerland in 2025/2026.
- 2020°C max day temperature
- 6 hours of sunshine per day
- 1212 days with some rainfall
- 1010°C min night temperature
- 1313 hours of daylight per day
- 0No heat & humidity
- 6464 mm of monthly rainfall
- 55 (Moderate) UV index
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Recommended for Switzerland
The September weather guide for Switzerland (Basel) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about Switzerland
How hot is it in Basel in September?
Daytime temperatures usually reach 20°C in Basel in September, falling to 10°C at night.
How sunny is it in Basel in September?
There are normally 6 hours of bright sunshine each day in Basel in September - that's 45% of daylight hours.
Does it rain in Basel in September?
There are usually 12 days with some rain in Basel in September and the average monthly rainfall is 64mm.
Basel September sunrise & sunset times
Browse the sunrise and sunset times for Basel in September 2025. Select a month to view Basel sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:48 | 19:10 |
Monday, 15th September 2025 | 06:07 | 18:42 |
Tuesday, 30th September 2025 | 06:27 | 18:11 |
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