Basel weather in August
August in Basel: warm, rainy, with clean air — one of the best months to visit.
#1 of 12 months in Basel · #88 of 604 destinations to visit in August · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Basel climate normals — August
| Daytime high | 26°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 26°C / 79°F | |
| Rainfall | 113 mm / 4.4 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 66% | 💧 humid |
| Dew point | 14°C / 58°F | |
| Sunshine | 10.4 h/day | |
| Daylight | 14.2 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 47 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Basel in August — FAQ
- Is August a good time to visit Basel?
- August in Basel: warm, rainy, with clean air — one of the best months to visit. It ranks #1 of 12 months for Basel on SeasonMap's comfort score (89/100).
- What is the weather like in Basel in August?
- In August, Basel averages a daily high of 25.6°C and a low of 15.5°C, with about 112.5 mm of rain over roughly 13.6 rainy days.
- What is the air quality in Basel in August?
- Basel has a mean US Air Quality Index of about 47 in August.