Verdict: Good month
Wengen Weather in September
September is mild-to-cool in Wengen, topping out near 16°C (61°F) — comfortable with a layer on. It's also the wet side of the calendar: rain falls on about 19 days, so build flexibility into plans. Overall, September is a solid month to visit Wengen.
Average high
16°C / 61°F
Average low
9°C / 48°F
Rain days
~19
Precipitation
200 mm
What to pack for Wengen in September
- Layers — t-shirts under a light jacket or sweater
- Rain gear is non-negotiable — expect rain on roughly 19 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Wengen: Jul (20°C / 68°F) · Coolest: Jan (3°C / 37°F) · Wettest: May (~23 rain days)
3°
-4°
Jan
6°
-2°
Feb
7°
-1°
Mar
10°
1°
Apr
13°
5°
May
18°
10°
Jun
20°
12°
Jul
20°
12°
Aug
16°
9°
Sep
14°
6°
Oct
8°
1°
Nov
4°
-2°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)