St. Moritz weather in August
Temperature, sea 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: July – August
Best for skiing: November – April
What is the weather like in St. Moritz in August?
In August, St. Moritz is mild: daytime highs average 17 °C, and nights cool down to about 7 °C. Expect around 6 hours of sunshine a day. It rains often – on about 16 days, adding up to 168 mm. All in all, August is a good month for a holiday in St. Moritz.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 61 | 63 | 51 |
| Day | 17° | 17° | 13° |
| Night | 7° | 7° | 4° |
| Sun | 6 h | 6 h | 5 h |
| Rain days | 18 | 16 | 13 |
More details for August
- Daylight
- 14 h 15 min06:18 – 20:33
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 7 km/haverage daily peak
- Cloud cover
- 65 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+2Europe/Zurich
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %47 %
- Few rainy daysweight 30 %13 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Mountain air”.
What to pack in August
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
St. Moritz in August: quick answers
Is St. Moritz hot in August?
No. In August, St. Moritz is mild: daytime highs average 17 °C and nights drop to about 7 °C.
Does it rain much in St. Moritz in August?
It rains often – on about 16 days, adding up to 168 mm.
St. Moritz month by month
The whole year in St. MoritzAll 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)