St. Moritz Weather in August
August in St. Moritz averages 16°C (61°F) during the day and 5°C (41°F) at night. Quite a bit of rainfall is typical this month, with around 151 mm (5.9 in) on average. An umbrella is a good idea.
Rainfall in St. Moritz in August
On average, there are about 20 days with rain during this month, averaging 151 mm (5.9 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in St. Moritz in August
August in St. Moritz brings typical temperatures with highs around 16°C (61°F) and lows of 5°C (41°F). The summer season takes place during August. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 5°C (41°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in St. Moritz in August
With about 183 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.If you're inclined towards comfortable temperatures and drier conditions, August is a good time to visit St. Moritz.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our St. Moritz's climate page.
St. Moritz Temperature in August
Min Temperature
5°C (41°F)
Max Temperature
16°C (61°F)
Chance of Rain
66%
Precipitation
151 mm (5.9 in)
Rainy days
20 days
Humidity
75% *
Sunshine
183 hours *
Percentage Sunshine
57% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in St. Moritz typically stay consistent throughout August, with daily highs averaging around 16°C (61°F). Nights are cold, with lows typically ranging from 4°C (39°F) to 6°C (43°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for St. Moritz in August
Browse day-by-day weather records for St. Moritz spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
St. Moritz historical weather extremes in August
Based on 49 years of weather observations in St. Moritz between 1976 and 2025, these are the recorded extremes.
- St. Moritz recorded its highest August temperature of 30°C (86°F) on August 11, 1998.
- The lowest overnight temperature recorded in August was -8°C (18°F) (August 8, 2005).
Best Places in Switzerland in August
Find out more about the weather in Switzerland and which places have the best travel conditions in this month. See all of Switzerland in August →
perfect weather
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What to Wear in St. Moritz in August
The weather can be unpredictable in August, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in St. Moritz in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our St. Moritz's climate page.
Temperature Rainfall Sunshine Humidity
See the full St. Moritz climate overview or explore weather in Switzerland.
