St. Gallen weather in August
Temperature, rain and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Good
Best time to visit: June – September
What is the weather like in St. Gallen in August?
In August, St. Gallen is warm: daytime highs average 21 °C, and nights cool down to about 13 °C. The sun shines for around 7 hours a day. It rains often – on about 17 days, adding up to 182 mm. All in all, August is a good month for a holiday in St. Gallen.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 64 | 65 | 63 |
| Day | 21° | 21° | 17° |
| Night | 13° | 13° | 9° |
| Sun | 7 h | 7 h | 5 h |
| Rain days | 18 | 17 | 14 |
More details for August
- Daylight
- 14 h 19 min06:18 – 20:37
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 10 km/haverage daily peakAll months
- Cloud cover
- 58 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+2Europe/Zurich
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %63 %
- Few rainy daysweight 30 %9 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
St. Gallen in August: quick answers
Is St. Gallen hot in August?
Warm rather than hot: in August, daytime highs in St. Gallen average 21 °C and nights cool to about 13 °C.
Does it rain much in St. Gallen in August?
It rains often – on about 17 days, adding up to 182 mm.
St. Gallen month by month
The whole year in St. GallenAll destinations: SwitzerlandWhere to go in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences