Valais (Zermatt)
September
Weather in Valais for September 2025
Your guide to Valais weather in September - trends and predictions
With an average of 5 snowy days, Valais usually enjoys a light touch of snow in September.
In general, the average temperature in Valais at the beginning of September is 12.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 7.4 °C by the end of September.
Snow Forecast ❄️
Temperatures
0
Dry days
25
Rainy days
5
Snow days
9°/2°
Temperatures
10 km/h
Avg max wind
79 %
Avg humidity
Valais in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  12° | 2  11° | 3  12° | 4 12° | 5 12° | 6 13° | 7  13° |
| 8 12° | 9 10° | 10 11° | 11 12° | 12 10° | 13 8° | 14 8° |
| 15  10° | 16 8° | 17  8° | 18 8° | 19 6° | 20 6° | 21 6° |
| 22 7° | 23  6° | 24 7° | 25 8° | 26 8° | 27  8° | 28 7° |
| 29 7° | 30 7° |
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Temperatures trend during September in Valais
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Sept. | Patchy rain possible | 12° /3° | 3.7 mm | 0 cm | |
| 2 Sept. | Patchy light rain with thunder | 11° /4° | 2.9 mm | 0 cm | |
| 3 Sept. | Moderate rain at times | 12° /4° | 2.6 mm | 0 cm | |
| 4 Sept. | Moderate rain at times | 12° /4° | 2.8 mm | 0 cm | |
| 5 Sept. | Moderate rain at times | 12° /4° | 13.7 mm | 0 cm | |
| 6 Sept. | Patchy rain possible | 13° /4° | 2.2 mm | 0 cm | |
| 7 Sept. | Partly cloudy | 13° /4° | 3 mm | 0 cm | |
| 8 Sept. | Patchy rain possible | 12° /5° | 4.3 mm | 0 cm | |
| 9 Sept. | Patchy rain possible | 10° /3° | 5.5 mm | 0 cm | |
| 10 Sept. | Patchy rain possible | 11° /3° | 2.1 mm | 0 cm | |
| 11 Sept. | Patchy rain possible | 12° /3° | 2.9 mm | 0 cm | |
| 12 Sept. | Patchy rain possible | 10° /2° | 1.2 mm | 0.5 cm | |
| 13 Sept. | Patchy rain possible | 8° /2° | 10.9 mm | 0.9 cm | |
| 14 Sept. | Patchy rain possible | 8° /2° | 2.4 mm | 0.1 cm | |
| 15 Sept. | Heavy rain at times | 10° /3° | 6 mm | 0 cm | |
| 16 Sept. | Moderate or heavy rain shower | 8° /3° | 5 mm | 0 cm | |
| 17 Sept. | Overcast | 8° /0° | 1.3 mm | 0 cm | |
| 18 Sept. | Moderate rain at times | 8° /0° | 6 mm | 0 cm | |
| 19 Sept. | Moderate or heavy rain shower | 6° /-1° | 14 mm | 0 cm | |
| 20 Sept. | Moderate rain at times | 6° /-1° | 1.6 mm | 0 cm | |
| 21 Sept. | Partly cloudy | 6° /0° | 2.2 mm | 0 cm | |
| 22 Sept. | Overcast | 7° /0° | 3.8 mm | 0 cm | |
| 23 Sept. | Sunny | 6° /0° | 5.5 mm | 0.1 cm | |
| 24 Sept. | Sunny | 7° /-1° | 3.3 mm | 0 cm | |
| 25 Sept. | Moderate rain at times | 8° /0° | 1.9 mm | 0 cm | |
| 26 Sept. | Moderate rain at times | 8° /1° | 5.6 mm | 0 cm | |
| 27 Sept. | Cloudy | 8° /0° | 2.2 mm | 0.5 cm | |
| 28 Sept. | Patchy rain possible | 7° /0° | 2 mm | 0.4 cm | |
| 29 Sept. | Patchy rain possible | 7° /-1° | 2 mm | 0 cm | |
| 30 Sept. | Partly cloudy | 7° /0° | 3.2 mm | 0.2 cm | |
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Important Notice
Our weather forecast for Valais in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Valais forecast closer to your planned date for the most up-to-date weather information.
Valais in September - FAQ
What are the expected maximum and minimum temperatures in Valais during September?
Prepare for cooler days with highs just around 9° and colder nights, dipping below 2°.
How much rainfall should be expected in Valais during September?
Significant rainfall exceeding 125.6 mm is expected in Valais during September, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Valais in September 2025?
Valais experiences an average snowfall of 2.565 cm during September, occurring over 5 days.
What are the typical wind conditions in Valais during September?
The average wind speed in Valais during September is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
Valais snow forecast September 2025
Track daily snowfall levels and discover Valais’s snowy potential this September ❄️
September rainfall patterns in Valais
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