SeasonMapGrindelwald (Jungfrau) weather in September
Switzerland
September in Grindelwald: nice, soaked, with clean air — fine if you can take 16 rainy days.
#1 of 12 months in Grindelwald · #519 of 1383 destinations to visit in September · comfort 84/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Grindelwald in September
Grindelwald's forum calls September usually fantastic, highs around 70°F with sunny stretches and comparatively little rain, though a cold front can still drop temperatures early in the month. Regulars flag frost as typical around 1500m by late September, and note the Jungfraujoch stays cold enough to feel like winter even in warm layers — pack for both T-shirt afternoons in the valley and near-freezing conditions higher up.
Add your own note from Grindelwald's card on the map.
Grindelwald climate normals — September
| Daytime high | 18°C / 65°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 49°F | |
| Feels like (high) | 18°C / 64°F | |
| Rainfall | 180 mm / 7.1 in | ⛈ soaked |
| Rainy days | 16 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 11°C / 51°F | |
| Sunshine | 9 h/day | |
| Daylight | 12.5 h | |
| Wind | 7 km/h / 4 mph | |
| Snowfall | 4.7 cm / 1.9 in | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Grindelwald in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Busyschool holidays in 3 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Grindelwald's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherGrindelwald's best weather comes in April, May and September — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Grindelwald in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Trail and hut season
15 Jun – 15 Oct · usuallyTrail seasonBook earlyThe Eiger trail and the huts under the north face clear from mid-June, and the walking runs to about the middle of October before the first snow closes the higher paths.
Nearby, and something's on
Within 300 km of Grindelwald — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Grindelwald?
Grindelwald in September — FAQ
- Is September a good time to visit Grindelwald?
- September in Grindelwald: nice, soaked, with clean air — fine if you can take 16 rainy days. It ranks #1 of 12 months for Grindelwald on SeasonMap's comfort score (84/100).
- What is the weather like in Grindelwald in September?
- In September, Grindelwald averages a daily high of 18.1°C and a low of 9.2°C, with about 179.9 mm of rain over roughly 16.4 rainy days.
- What is the air quality in Grindelwald in September?
- Grindelwald has a mean US Air Quality Index of about 35 in September.
- Does it snow in Grindelwald in September?
- Grindelwald sees roughly 4.7 cm of snowfall in September.
Other months in Grindelwald
Compare Grindelwald in September
Warmer or cooler than Grindelwald in September
Similar destinations in Central Europe — September
Within 300 km: Interlaken's Lake steamers on summer timetable on 9 May – 11 Oct, and Gstaad's Walking season and alpine dairies around 15 Jun – 10 Oct.