Verdict: Good month
Grindelwald Weather in September
September hits the sweet spot in Grindelwald — highs around 18°C (64°F), ideal for a full day on foot. It's also the wet side of the calendar: rain falls on about 17 days, so build flexibility into plans. Overall, September is a solid month to visit Grindelwald.
Average high
18°C / 64°F
Average low
10°C / 50°F
Rain days
~17
Precipitation
186 mm
What to pack for Grindelwald in September
- Layers — t-shirts under a light jacket or sweater
- Rain gear is non-negotiable — expect rain on roughly 17 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Grindelwald: Jul (22°C / 72°F) · Coolest: Jan (4°C / 39°F) · Wettest: May (~22 rain days)
4°
-1°
Jan
7°
1°
Feb
8°
1°
Mar
10°
2°
Apr
15°
6°
May
20°
10°
Jun
22°
12°
Jul
22°
12°
Aug
18°
10°
Sep
15°
7°
Oct
9°
3°
Nov
6°
0°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)