Valais (Zermatt)
September
Weather in Valais for September 2025
Your guide to Valais weather in September - trends and predictions
In general, the average temperature in Valais at the beginning of September is 11.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 6.3 °C by the end of September.
The climate of Valais in September is notably wet, with an average of 15 rainy days.
Snowfall in Valais during September is quite rare, with fewer than 2 snowy days on average.
Is September a good time to visit Valais? check out the best time to travel to Valais page.
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14
Dry days
15
Rainy days
1
Snow days
10°/2°
Temperatures
9 km/h
Avg max wind
76 %
Avg humidity
Valais in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  10° | 2  10° | 3  12° | 4  12° | 5 10° | 6 13° | 7 13° |
| 8 12° | 9 9° | 10 11° | 11 10° | 12  6° | 13  1° | 14 3° |
| 15 7° | 16 6° | 17 8° | 18  6° | 19 6° | 20 5° | 21 5° |
| 22 5° | 23  1° | 24 4° | 25 6° | 26 7° | 27 8° | 28 5° |
| 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 | 10° /2° | 3.2 mm | 0 cm | |
| 2 Sept. | Patchy light rain with thunder | 10° /2° | 2.8 mm | 0 cm | |
| 3 Sept. | Sunny | 12° /2° | 0.9 mm | 0 cm | |
| 4 Sept. | Partly cloudy | 12° /4° | 2.9 mm | 0 cm | |
| 5 Sept. | Sunny | 10° /3° | 24 mm | 0 cm | |
| 6 Sept. | Patchy rain possible | 13° /3° | 1.2 mm | 0 cm | |
| 7 Sept. | Patchy rain possible | 13° /3° | 0.9 mm | 0 cm | |
| 8 Sept. | Patchy rain possible | 12° /4° | 1.4 mm | 0 cm | |
| 9 Sept. | Light rain shower | 9° /3° | 8.3 mm | 0 cm | |
| 10 Sept. | Patchy light rain with thunder | 11° /2° | 3 mm | 0 cm | |
| 11 Sept. | Patchy light rain with thunder | 10° /2° | 5.5 mm | 0 cm | |
| 12 Sept. | Thundery outbreaks possible | 6° /-1° | 1.9 mm | 0.9 cm | |
| 13 Sept. | Moderate or heavy rain shower | 1° /-3° | 20.2 mm | 1.8 cm | |
| 14 Sept. | Thundery outbreaks possible | 3° /-3° | 0.2 mm | 0.1 cm | |
| 15 Sept. | Thundery outbreaks possible | 7° /0° | 0 mm | 0 cm | |
| 16 Sept. | Light rain shower | 6° /0° | 0.6 mm | 0 cm | |
| 17 Sept. | Sunny | 8° /-1° | 0.8 mm | 0 cm | |
| 18 Sept. | Moderate or heavy rain with thunder | 6° /0° | 8.1 mm | 0 cm | |
| 19 Sept. | Thundery outbreaks possible | 6° /-1° | 1.3 mm | 0 cm | |
| 20 Sept. | Light rain shower | 5° /-1° | 1.4 mm | 0 cm | |
| 21 Sept. | Light rain shower | 5° /1° | 1.3 mm | 0 cm | |
| 22 Sept. | Moderate or heavy rain with thunder | 5° /0° | 7.1 mm | 0 cm | |
| 23 Sept. | Moderate or heavy snow with thunder | 1° /-2° | 10.5 mm | 0.2 cm | |
| 24 Sept. | Sunny | 4° /-4° | 0.2 mm | 0 cm | |
| 25 Sept. | Sunny | 6° /-2° | 0.1 mm | 0 cm | |
| 26 Sept. | Sunny | 7° /0° | 9.3 mm | 0 cm | |
| 27 Sept. | Sunny | 8° /0° | 1.3 mm | 0 cm | |
| 28 Sept. | Patchy rain possible | 5° /-2° | 1 mm | 0.8 cm | |
| 29 Sept. | Sunny | 7° /-1° | 0 mm | 0 cm | |
| 30 Sept. | Mist | 7° /1° | 2.2 mm | 0 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 10° and colder nights, dipping below 2°.
How much rainfall should be expected in Valais during September?
Significant rainfall exceeding 100.5 mm is expected in Valais during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
Is snowfall common in Valais during September?
Valais experiences an average snowfall of 0.3 cm during September, occurring over 1 days, which may interest winter sports enthusiasts.
What are the typical wind conditions in Valais during September?
The average wind speed in Valais during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Valais in September?
As you prepare for your trip to Valais in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Valais, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Valais
Explore the daily rainfall trends and prepare for Valaiss September weather 💧
September snowfall in Valais
Track daily snowfall levels and discover Valais’s snowy potential this September ❄️
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