Zermatt weather in September
September in Zermatt: nice, rainy, with clean air — a hit-or-miss time to visit.
#9 of 12 months in Zermatt · #586 of 604 destinations to visit in September · comfort 44/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Zermatt climate normals — September
| Daytime high | 17°C / 63°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 48°F | |
| Feels like (high) | 17°C / 63°F | |
| Rainfall | 120 mm / 4.7 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 9°C / 49°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 12.5 h | |
| Wind | 6 km/h / 3 mph | |
| Snowfall | 16.5 cm / 6.5 in | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Zermatt in September — FAQ
- Is September a good time to visit Zermatt?
- September in Zermatt: nice, rainy, with clean air — a hit-or-miss time to visit. It ranks #9 of 12 months for Zermatt on SeasonMap's comfort score (44/100).
- What is the weather like in Zermatt in September?
- In September, Zermatt averages a daily high of 17°C and a low of 9°C, with about 120.1 mm of rain over roughly 17.4 rainy days.
- What is the air quality in Zermatt in September?
- Zermatt has a mean US Air Quality Index of about 37 in September.
- Does it snow in Zermatt in September?
- Zermatt sees roughly 16.5 cm of snowfall in September.