Switzerland
St. Moritz in August: weather & travel advice
This month's data profile
Rain shapes the decision
St. Moritz in August is climatically mixed. The average daily high is around 16 °C. With about 18 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
45/100 · #1
Warmth
#2
Dryness
#9
Sun
#3
Published best categories: none
St. Moritz · AugustPhoto: Isiwal · CC BY-SA 4.0Climate facts
- Average high
- 16 °C
- Average low
- 6 °C
- Rainy days (est.)
- 18 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 78 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| July | 16 | 6 | 20 | 133 | 7.1 | 77 | 1.1 | 45 |
| August (selected) | 16 | 6 | 18 | 136 | 6.2 | 78 | 1.0 | 45 |
| September | 12 | 2 | 15 | 113 | 4.8 | 81 | 1.0 | 38 |
How do the previous and next months compare?
Baseline: August (45/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| July | ±0 | +0.2 °C | -0.2 °C | +1.4 | -2.9 mm | +0.9 h | -1.3 % | +0.1 m/s |
| September | -7 | -3.9 °C | -3.8 °C | -3.2 | -23.5 mm | -1.4 h | +2.9 % | ±0 m/s |
All twelve months in context
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Where to stay in St. Moritz
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Useful next decisions
Frequently asked questions
How warm is St. Moritz in August?
The average daily high is around 16 °C, with an average daily low of about 6 °C.
Does it rain a lot in St. Moritz in August?
The curated estimate is about 18 rainy days per month, not a directly measured long-term average. Total precipitation averages around 136 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit St. Moritz?
No month in St. Moritz reaches the threshold for a clear recommendation in the climate score; the month comparison above shows the differences.