Switzerland
Interlaken in September
🍂 AutumnPleasant and some showers.
🎒 Pack: light layers
Why September scores 9.4What goes into the score
How it works- Weather comfort8.9
- ✓Comfortable temperatures (19°C highs / 10°C lows)
- ✓Comfortable humidity (dew point 7.1°C)
- ✓Mostly dry (~94 mm rain)
- Air quality10.0
- ✓Good (within WHO guideline) (PM2.5 ~2 µg/m³)
- Seasonal hazards10.0
- ·No notable seasonal hazards
- Safety baseline9.0
- ·Normal precautions
| Sep | Jul | |
|---|---|---|
| Score | 9.4 Excellent | 9.4 Excellent |
| Season | 🍂 Autumn | ☀️ Summer |
| High / low | 19° / 10° | 24° / 14° |
| Rain | 94 mm | 146 mm |
| Humidity | dew pt 7° | dew pt 11° |
| PM2.5 | 2 µg/m³ | 4 µg/m³ |
Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: Interlaken weather-station normals. Rainfall: Interlaken weather-station normals (national met service).
Holidays & crowdsSeptember 2027
No long holidaysNo long public-holiday weekends this month. School holidays aren't counted, so check those if you want to avoid family crowds.
No national public holidays in Switzerland this month.
National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).
Nature calendarBlossoms, leaves & seasons in Interlaken
- Snowy daysTypical datesSnow likely Nov–Mar (most in Feb: ~5 days)
Average number of days with snowfall at Interlaken. About 27 cm of snow falls in an average Feb.
Source: Interlaken weather-station normals (national weather service, via Wikipedia climate table)
Explore InterlakenEvents, sights, food & souvenirs
Check event dates locallyA Swiss resort town between Lake Thun and Lake Brienz, the main base for the Jungfrau region's mountains, valleys and outdoor activities.
Jungfrau MarathonDate variesUsually September
A scenic mountain marathon with a large climb.
Why go: Accommodation fills on race weekend.
Where: Interlaken to Kleine Scheidegg area
Coming up later
Ski seasonDate variesUsually December to April
Ski areas in the Jungfrau region open in winter.
Why go: Some summer-only railways and paths are closed in winter.
Where: Grindelwald, Wengen and Mürren
Lauberhorn ski racesDate variesUsually mid-January
Classic World Cup ski races, including one of the longest downhill courses.
Why go: Wengen fills up; book early and use the train.
Where: Wengen
Swiss National DayEvery year1 August every year
Celebrated with bonfires on mountains, lanterns and fireworks.
Why go: A public holiday, so some shops close.
Where: Interlaken and villages across the region
Jungfraujoch
A high-altitude station reached by cog railway, with glacier views and an ice palace.
💡 Altitude can cause breathlessness; go on a clear day and dress warmly.
Harder Kulm
A viewpoint above Interlaken reached by funicular, overlooking both lakes and the Eiger, Mönch and Jungfrau.
Lauterbrunnen Valley
A deep glacial valley with many waterfalls, including Staubbach Falls.
Trümmelbach Fallsgreat in Sep
Glacier-fed waterfalls inside a mountain, reached by lift and walkways.
💡 Open seasonally, usually spring to autumn.
Lake Thun and Lake Brienz cruises
Boat trips past lakeside villages and castles.
Grindelwald First
A mountain area above Grindelwald with a cliff walk, hiking and mountain carts.
Rösti
Crispy grated potato cakes, often topped with cheese or an egg.
Cheese fondue
Melted Swiss cheese shared at the table with bread.
Älplermagronen
Alpine macaroni with potatoes, cheese, cream and apple sauce.
Meringues
Large meringues served with double cream, a speciality linked to nearby Meiringen.
Brienz woodcarvings
Hand-carved wooden figures from Brienz, a long-established woodcarving centre.
Swiss army knives
Multi-tools from Swiss manufacturers.
Swiss chocolate
Chocolate from Swiss chocolatiers.
Airport transfer Kiwitaxi
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