Interlaken records about 1197mm of rain across roughly 118 wet days a year, which is a 32% chance on an average day. June is the wettest month at 136mm (11% of the annual total) and February the driest at 52mm. Local rain type: steady rain. Interlaken sits between two lakes that generate their own weather. Rain can sweep in quickly from either direction — carry waterproofs.
Chance of rain on an average day: 32%
Rainfall climatology for Interlaken. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 1197mm |
| Rain days per year | 118 |
| Odds on an average day | 32% |
| Wettest month | June — 136mm over 15 days |
| Driest month | February — 52mm over 6 days |
| Rain type | steady rain |
| Best dry window | September offers the most stable, dry conditions for outdoor activities. |
| Worst rain window | June brings the most rainfall, though sunshine hours also peak. |
June delivers 162% more rain than February (136mm vs 52mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 11% of the annual total, so rain in Interlaken is spread through the year — there is no season you can rely on being dry.
Interlaken rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 15 days in June against 6 in February — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 62mm | 7 | 23% | 3°C |
| February | 52mm | 6 | 20% | 3°C |
| March | 72mm | 8 | 27% | 6°C |
| April | 82mm | 9 | 30% | 11°C |
| May | 106mm | 12 | 40% | 16°C |
| June | 136mm | 15 | 50% | 21°C |
| July | 118mm | 13 | 43% | 24°C |
| August | 122mm | 13 | 43% | 24°C |
| September | 92mm | 10 | 33% | 21°C |
| October | 78mm | 9 | 30% | 16°C |
| November | 82mm | 9 | 30% | 11°C |
| December | 68mm | 7 | 23% | 6°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Interlaken we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Interlaken records rain on roughly 118 days a year — about a 32% chance on any given day — totalling around 1197mm.
June, with about 136mm over 15 rain days. That is 11% of the entire year's rainfall in a single month.
February is the driest month at 52mm across roughly 6 days. September offers the most stable, dry conditions for outdoor activities.
Interlaken sits between two lakes that generate their own weather. Rain can sweep in quickly from either direction — carry waterproofs.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.