Switzerland
Zermatt in September: weather & travel advice
This month's data profile
Rain shapes the decision
Zermatt in September is climatically mixed. The average daily high is around 11 °C. With about 14 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
40/100 · #3
Warmth
#4
Dryness
#6
Sun
#6
Published best categories: none
Zermatt · SeptemberPhoto: flamouroux · CC BY-SA 2.0Climate facts
- Average high
- 11 °C
- Average low
- 1 °C
- Rainy days (est.)
- 14 rainy days (est.)
- Sun (est.)
- 5 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 |
|---|---|---|---|---|---|---|---|---|
| August | 15 | 5 | 15 | 89 | 6.5 | 74 | 1.4 | 50 |
| September (selected) | 11 | 1 | 14 | 81 | 5.0 | 78 | 1.4 | 40 |
| October | 6 | -2 | 13 | 81 | 3.2 | 80 | 1.4 | 32 |
How do the previous and next months compare?
Baseline: September (40/100)
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 | |
|---|---|---|---|---|---|---|---|---|
| August | +10 | +3.8 °C | +3.5 °C | +0.8 | +7.7 mm | +1.5 h | -3.7 % | ±0 m/s |
| October | -8 | -4.3 °C | -3.4 °C | -0.3 | -0.7 mm | -1.8 h | +2 % | +0.1 m/s |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Zermatt in September?
The average daily high is around 11 °C, with an average daily low of about 1 °C.
Does it rain a lot in Zermatt in September?
The curated estimate is about 14 rainy days per month, not a directly measured long-term average. Total precipitation averages around 81 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Zermatt?
No month in Zermatt reaches the threshold for a clear recommendation in the climate score; the month comparison above shows the differences.