Measured, not vibes
Best Time to Visit Interlaken
By measured weather comfort, the top months for Interlaken are August, September, July — and RouteVerdict's editorial pick, which also weighs crowds and prices, is January, February, March, June, July, August, September, December. The table below is computed from ERA5 reanalysis data for 2020–2024, measured at Interlaken (570 m elevation).
Month by month
Interlaken weather and comfort, 2020–2024
| Month | Avg high | Wet days | Comfort | Season |
|---|---|---|---|---|
| January | 6.8°C / 44°F | 12.7 | 15 | |
| February | 10.2°C / 50°F | 11.3 | 28 | |
| March | 11.7°C / 53°F | 11.2 | 35 | |
| April | 14.2°C / 58°F | 12.5 | 47 | |
| May | 17.9°C / 64°F | 16.7 | 57 | Shoulder |
| June | 22.8°C / 73°F | 15 | 70 | |
| July | 24.4°C / 76°F | 14.2 | 71 | Best |
| August | 24.5°C / 76°F | 11.7 | 76 | Best |
| September | 20.8°C / 69°F | 12 | 74 | Best |
| October | 17.7°C / 64°F | 11.2 | 65 | Shoulder |
| November | 11.4°C / 53°F | 11.7 | 33 | |
| December | 8°C / 46°F | 13.7 | 18 |
Comfort is RouteVerdict's 0–100 score: 100·exp(−(high−23)²/162) × (1 − min(0.35, wet days × 0.02)). The full method is on the methodology page. Weather data by Open-Meteo.com (ERA5, CC BY 4.0), 2020–2024 normals. Wet day = ≥1 mm precipitation.
What the seasons are actually like
Traveling to Interlaken month by month
Interlaken's comfort score peaks in August at 75.5, with an average high of 24.5°C and 11.7 wet days, just ahead of September's 73.8 and July's 70.7. RouteVerdict's editorial pick spans January through March, June through September, and December — an unusual mix that includes the depths of winter alongside the warm season. January is the coldest month at 6.8°C, with comfort at just 14.8, the lowest of the year. May is notably wet, at 16.7 wet days, the highest of any month, though comfort still holds at 56.7.
FAQ
Interlaken timing questions
What is the best month to visit Interlaken?
By measured weather comfort (ERA5 2020–2024), the top months are August, September, and July, with August scoring highest. RouteVerdict's editorial pick is January, February, March, June, July, August, September, and December, which also weighs crowds, prices, and events.
What is the hottest month in Interlaken?
August, with an average daily high of 24.5°C (76°F).
What is the rainiest month in Interlaken?
May, averaging 16.7 days with at least 1 mm of precipitation.
When is shoulder season in Interlaken?
October and May — the best-scoring months outside both the measured top three and RouteVerdict's editorial peak-season pick.
Why does Interlaken's editorial pick include January through March if they're cold months?
January averages just 6.8°C with a comfort score of 14.8 — the lowest of the year — but RouteVerdict's editorial pick still includes January through March alongside the summer months.
What is Interlaken's wettest month?
May, averaging 16.7 wet days — more than any other month — though its comfort score of 56.7 still holds up reasonably well.