Sierre in September
5.9out of 10
Possible, with caveats
Cool: highs only around 13°C. Frequent rain: about 13 rainy days.
13°CAvg high
3°CAvg low
13Rainy days (106 mm)
12:19 hDaylight
07:15Sunrise · 19:33 Sunset
Why this score
- Cool: highs only around 13°C
- Frequent rain: about 13 rainy days
What to wear and pack
- A warm jacket
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±3.1 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -5°C | -14°C | 117 mm | 12 | – | – | 3.3 |
| February | -2°C | -12°C | 99 mm | 12 | – | – | 3.5 |
| March | 2°C | -7°C | 101 mm | 13 | – | – | 3.5 |
| April | 6°C | -3°C | 106 mm | 13 | – | – | 4.3 |
| May | 11°C | 1°C | 138 mm | 16 | – | – | 4.7 |
| June | 15°C | 5°C | 130 mm | 17 | – | – | 5.6 |
| July | 17°C | 7°C | 127 mm | 16 | – | – | 6.0 |
| August | 17°C | 6°C | 119 mm | 14 | – | – | 6.3 |
| September | 13°C | 3°C | 106 mm | 13 | – | – | 5.9 |
| October | 9°C | -1°C | 102 mm | 12 | – | – | 5.0 |
| November | 1°C | -8°C | 122 mm | 13 | – | – | 3.2 |
| December | -4°C | -13°C | 125 mm | 13 | – | – | 3.1 |
Frequently asked questions
How hot is Sierre in September?
Daytime highs average 13°C and nights about 3°C.
When is the best time to visit Sierre?
The best months are August, July, September.