The highest day temperature in August 2025 was 75°F. The lowest night temperature was 27°F. The average values for day and night temperatures during August were 61.2°F и 37.8°F respectivly.

You can expect various weather conditions during August. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in August for St Moritz is 6.9 in. It makes august the most rainy month of the year.

The average wind speed in August is 4.9 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for St Moritz in August is 7.5 hours.