Swiss Alps records about 1400mm of rain across roughly 120 wet days a year, which is a 33% chance on an average day. June is the wettest month at 132mm (9% of the annual total) and February the driest at 72mm. Local rain type: snow mix. The Swiss Alps generate their own weather — carry waterproofs on any hike regardless of morning forecasts. Afternoon thunderstorms build regularly in summer.
Chance of rain on an average day: 33%
Rainfall climatology for Swiss Alps. 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 | 1400mm |
| Rain days per year | 120 |
| Odds on an average day | 33% |
| Wettest month | June — 132mm over 14 days |
| Driest month | February — 72mm over 7 days |
| Rain type | snow mix |
| Best dry window | September offers the clearest, most stable mountain weather. |
| Worst rain window | June through August has the most rainfall as afternoon thunderstorms, despite being the main hiking season. |
June delivers 83% more rain than February (132mm vs 72mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 9% of the annual total, so rain in Swiss Alps is spread through the year — there is no season you can rely on being dry.
Swiss Alps rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 14 days in June against 7 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 | 80mm | 8 | 27% | -2°C |
| February | 72mm | 7 | 23% | -2°C |
| March | 82mm | 8 | 27% | 1°C |
| April | 88mm | 9 | 30% | 6°C |
| May | 108mm | 11 | 37% | 12°C |
| June | 132mm | 14 | 47% | 17°C |
| July | 118mm | 12 | 40% | 20°C |
| August | 125mm | 13 | 43% | 20°C |
| September | 96mm | 10 | 33% | 17°C |
| October | 82mm | 8 | 27% | 12°C |
| November | 88mm | 9 | 30% | 6°C |
| December | 92mm | 9 | 30% | 1°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Swiss Alps 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.
Swiss Alps records rain on roughly 120 days a year — about a 33% chance on any given day — totalling around 1400mm.
June, with about 132mm over 14 rain days. That is 9% of the entire year's rainfall in a single month.
February is the driest month at 72mm across roughly 7 days. September offers the clearest, most stable mountain weather.
The Swiss Alps generate their own weather — carry waterproofs on any hike regardless of morning forecasts. Afternoon thunderstorms build regularly in summer.
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.