Verdict: Good month
Zermatt Weather in September
September is mild-to-cool in Zermatt, topping out near 14°C (57°F) — comfortable with a layer on. Expect showers on roughly 12 days of the month — rarely trip-ruining, worth planning around. Overall, September is a solid month to visit Zermatt.
Average high
14°C / 57°F
Average low
5°C / 41°F
Rain days
~12
Precipitation
66 mm
What to pack for Zermatt in September
- Layers — t-shirts under a light jacket or sweater
- Rain gear is non-negotiable — expect rain on roughly 12 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Zermatt: Jul (18°C / 64°F) · Coolest: Jan (0°C / 32°F) · Wettest: Dec (~14 rain days)
0°
-6°
Jan
3°
-4°
Feb
2°
-5°
Mar
5°
-2°
Apr
9°
3°
May
15°
7°
Jun
18°
9°
Jul
18°
8°
Aug
14°
5°
Sep
10°
2°
Oct
4°
-3°
Nov
1°
-6°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)