Weather in St. Moritz for September 2026
Giallo Temporali Allerta - See hour by hour.
With an average of 3 snowy days, St. Moritz usually enjoys a light touch of snow in September.
According to St. Moritz snow forecast for September 2026, no snow is expected in the next 2 weeks.Until now, September 2026 in St. Moritz is slightly cooler than the historical average by 1 °C.
Expect cooler weather in the next days in St. Moritz with the forecast suggesting a temperature of 11.8 °C, lower than the historical average.
In general, the average temperature in St. Moritz at the beginning of September is 15.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 11.6 °C by the end of September.
The climate of St. Moritz in September is notably wet, with an average of 12 rainy days, and a total of 135.5 mm of precipitation.
Official Weather Alert ⚠️
Snow Forecast ❄️
Temperatures
Rain 🌧️
St. Moritz Weather September
Temperatures trend during September in St. Moritz
September weather in St. Moritz day by day
| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Sept. |  Partly cloudy | 14° /2° | 6.6 mm | 0 cm | |
| 2 Sept. |  Patchy light rain with thunder | 14° /2° | 4.2 mm | 0 cm | |
| 3 Sept. |  Sunny | 15° /1° | 0.9 mm | 0 cm | |
| 4 Sept. |  Overcast | 17° /4° | 2.4 mm | 0 cm | |
| 5 Sept. | Sunny | 14° /3° | 5.2 mm | 0 cm | |
| 6 Sept. | Sunny | 17° /2° | 0 mm | 0 cm | |
| 7 Sept. | Sunny | 18° /3° | 1.1 mm | 0 cm | |
| 8 Sept. |  Patchy rain possible | 17° /4° | 2 mm | 0 cm | |
| 9 Sept. | Patchy rain possible | 14° /3° | 11.4 mm | 0 cm | |
| 10 Sept. | Patchy rain possible | 13° /2° | 6.8 mm | 0 cm | |
| 11 Sept. | Patchy light rain with thunder | 13° /1° | 3.2 mm | 0 cm | |
| 12 Sept. | Partly cloudy | 12° /-1° | 5.3 mm | 3 cm | |
| 13 Sept. | Overcast | 14° /3° | 0 mm | 0 cm | |
| 14 Sept. | Sunny | 12° /5° | 0 mm | 0 cm | |
| 15 Sept. | Sunny | 15° /4° | 0 mm | 0 cm | |
| 16 Sept. | Light rain shower | 12° /5° | 11.3 mm | 0 cm | |
| 17 Sept. | Patchy rain possible | 8° /3° | 14.7 mm | 0 cm | |
| 18 Sept. | Light rain shower | 5° /2° | 15.4 mm | 0 cm | |
| 19 Sept. | Patchy rain possible | 9° /3° | 0.1 mm | 0 cm | |
| 20 Sept. | Sunny | 11° /3° | 0 mm | 0 cm | |
| 21 Sept. | Sunny | 14° /5° | 0 mm | 0 cm | |
| 22 Sept. | Overcast | 11° /4° | 0 mm | 0 cm | |
| 23 Sept. | Sunny | 13° /3° | 0 mm | 0 cm | |
| 24 Sept. | Sunny | 15° /5° | 0 mm | 0 cm | |
| 25 Sept. | Sunny | 16° /6° | 0.3 mm | 0 cm | |
| 26 Sept. | Light rain shower | 10° /4° | 2.3 mm | 0 cm | |
| 27 Sept. | Patchy light rain with thunder | 10° /-1° | 6.4 mm | 0.3 cm | |
| 28 Sept. | Sunny | 9° /-4° | 6.7 mm | 5 cm | |
| 29 Sept. |  Mist | 10° /-4° | 0.1 mm | 0 cm | |
| 30 Sept. | Patchy rain possible | 11° /-2° | 0 mm | 0 cm | |
| Next | |||||
St. Moritz in September - FAQ
What are the expected maximum and minimum temperatures in St. Moritz during September?
How much rainfall should be expected in St. Moritz during September?
Will it snow in St. Moritz in September 2026?
What are the typical wind conditions in St. Moritz during September?
St. Moritz snow forecast September 2026
September rainfall patterns in St. Moritz
Quick links
Where is St. Moritz?Get accurate weather forecasts for St. Moritz, located at latitude 46.499 and longitude 9.843. Stay updated with localized weather information tailored for St. Moritz.