St. Moritz weather in August
August in St. Moritz: nice, soaked, with clean air — one of the weakest months to visit.
#11 of 12 months in St. Moritz · #588 of 604 destinations to visit in August · comfort 32/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
St. Moritz climate normals — August
| Daytime high | 17°C / 63°F | 😎 nice |
|---|---|---|
| Nighttime low | 8°C / 47°F | |
| Feels like (high) | 17°C / 63°F | |
| Rainfall | 200 mm / 7.9 in | ⛈ soaked |
| Rainy days | 18 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 9°C / 48°F | |
| Sunshine | 10.4 h/day | |
| Daylight | 14.1 h | |
| Wind | 9 km/h / 5 mph | |
| Snowfall | 2.8 cm / 1.1 in | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is St. Moritz?
Loading map…
St. Moritz in August — FAQ
- Is August a good time to visit St. Moritz?
- August in St. Moritz: nice, soaked, with clean air — one of the weakest months to visit. It ranks #11 of 12 months for St. Moritz on SeasonMap's comfort score (32/100).
- What is the weather like in St. Moritz in August?
- In August, St. Moritz averages a daily high of 17.2°C and a low of 8.2°C, with about 199.6 mm of rain over roughly 18.4 rainy days.
- What is the air quality in St. Moritz in August?
- St. Moritz has a mean US Air Quality Index of about 40 in August.
- Does it snow in St. Moritz in August?
- St. Moritz sees roughly 2.8 cm of snowfall in August.