Interlaken weather in September
September is one of the best months to visit Interlaken: highs of 12°C (54°F) and about 106 mm (4.2 in) of rain on average. Nights average 3°C (38°F) and cloud cover 60% (NASA POWER, 2001–2025 averages). It is the 6th driest month of the year and the 4th warmest. Compared with August, it is cooler and drier; October brings highs of 8°C (46°F) and 107 mm (4.2 in) of rain.
Is September a good time to visit Interlaken?
best month Weather score 47/100.
Yes. September is one of the best months for weather in Interlaken.
Advertisement
Does it rain a lot in Interlaken in September?
Some rain is normal: about 106 mm (4.2 in) falls in an average September. It is the 6th driest month of the year.
How warm is Interlaken in September?
Days average 12°C (54°F) and nights 3°C (38°F).
Interlaken weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | -4°C (25°F) | -12°C (10°F) | 81 mm | 76% | least pleasant |
| February | -3°C (26°F) | -12°C (10°F) | 69 mm | 74% | least pleasant |
| March | 0°C (32°F) | -8°C (18°F) | 89 mm | 70% | least pleasant |
| April | 5°C (40°F) | -3°C (27°F) | 103 mm | 69% | least pleasant |
| May | 10°C (50°F) | 1°C (35°F) | 154 mm | 73% | least pleasant |
| June | 15°C (59°F) | 6°C (43°F) | 151 mm | 66% | best |
| July | 17°C (62°F) | 8°C (46°F) | 148 mm | 59% | best |
| August | 16°C (61°F) | 7°C (45°F) | 165 mm | 60% | best |
| September | 12°C (54°F) | 3°C (38°F) | 106 mm | 60% | best |
| October | 8°C (46°F) | 0°C (31°F) | 107 mm | 68% | least pleasant |
| November | 1°C (35°F) | -5°C (22°F) | 114 mm | 75% | least pleasant |
| December | -3°C (27°F) | -10°C (13°F) | 92 mm | 76% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Advertisement