Switzerland · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Interlaken are June, August and September, when daytime temperatures are agreeable and rainfall is relatively low.
Interlaken sees its warmest weather in July, when daytime highs average around 24°C, and its coolest in January (around 3°C).
Annual precipitation totals roughly 1178mm — July is typically the wettest month (~146mm) and February the driest (~67mm).
A distinctly wetter period runs from May to August — worth planning around if you prefer dry days.
July is the sunniest month, with about 223 hours of sunshine.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 61 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 3° / -3°C | 72mm | 🤔 Fair |
| February | 5° / -2°C | 67mm | 🤔 Fair |
| March | 11° / 1°C | 73mm | 🤔 Fair |
| April | 15° / 4°C | 83mm | 👍 Good |
| May | 19° / 8°C | 122mm | 👍 Good |
| June | 22° / 12°C | 127mm | 🌟 Great |
| July | 24° / 14°C | 146mm | 👍 Good |
| August | 24° / 14°C | 146mm | 👍 Good |
| September | 19° / 10°C | 94mm | 👍 Good |
| October | 14° / 6°C | 80mm | 🤔 Fair |
| November | 8° / 1°C | 80mm | 🤔 Fair |
| December | 4° / -2°C | 91mm | ⚠️ Challenging |
January in Interlaken is cold, with average daytime highs around 3°C (38°F) and nighttime lows near -3°C (27°F). Expect roughly 72mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
☀️ About 67 hours of sunshine over the month (~2h/day).
🎒 What to pack — warm coat · sweaters and layers · scarf
February in Interlaken is cold, with average daytime highs around 5°C (42°F) and nighttime lows near -2°C (28°F). Expect roughly 67mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
☀️ About 82 hours of sunshine over the month (~3h/day).
🎒 What to pack — warm coat · sweaters and layers · scarf
March in Interlaken is chilly, with average daytime highs around 11°C (51°F) and nighttime lows near 1°C (34°F). Expect roughly 73mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
☀️ About 129 hours of sunshine over the month (~4h/day).
🎒 What to pack — jacket or coat · long-sleeve layers
April in Interlaken is mild, with average daytime highs around 15°C (58°F) and nighttime lows near 4°C (39°F). Expect roughly 83mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
☀️ About 164 hours of sunshine over the month (~5h/day).
🎒 What to pack — light jacket · layers for cool evenings
May in Interlaken is mild, with average daytime highs around 19°C (66°F) and nighttime lows near 8°C (47°F). Expect roughly 122mm of precipitation spread over about 13 rainy days, and this is one of the wetter months.
☀️ About 183 hours of sunshine over the month (~6h/day).
🎒 What to pack — light jacket · layers for cool evenings · compact umbrella or rain jacket
June in Interlaken is pleasantly warm, with average daytime highs around 22°C (72°F) and nighttime lows near 12°C (54°F). Expect roughly 127mm of precipitation spread over about 13 rainy days, and this is one of the wetter months.
☀️ About 200 hours of sunshine over the month (~7h/day).
🎒 What to pack — light layers · comfortable walking shoes · compact umbrella or rain jacket
July in Interlaken is pleasantly warm, with average daytime highs around 24°C (76°F) and nighttime lows near 14°C (57°F). Expect roughly 146mm of precipitation spread over about 13 rainy days, and this is one of the wetter months.
☀️ About 223 hours of sunshine over the month (~7h/day).
🎒 What to pack — light layers · comfortable walking shoes · compact umbrella or rain jacket
August in Interlaken is pleasantly warm, with average daytime highs around 24°C (75°F) and nighttime lows near 14°C (56°F). Expect roughly 146mm of precipitation spread over about 13 rainy days, and this is one of the wetter months.
☀️ About 199 hours of sunshine over the month (~7h/day).
🎒 What to pack — light layers · comfortable walking shoes · compact umbrella or rain jacket
September in Interlaken is pleasantly warm, with average daytime highs around 19°C (67°F) and nighttime lows near 10°C (50°F). Expect roughly 94mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
☀️ About 152 hours of sunshine over the month (~5h/day).
🎒 What to pack — light layers · comfortable walking shoes
October in Interlaken is mild, with average daytime highs around 14°C (57°F) and nighttime lows near 6°C (43°F). Expect roughly 80mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
☀️ About 102 hours of sunshine over the month (~3h/day).
🎒 What to pack — light jacket · layers for cool evenings
November in Interlaken is cold, with average daytime highs around 8°C (46°F) and nighttime lows near 1°C (34°F). Expect roughly 80mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
☀️ About 68 hours of sunshine over the month (~2h/day).
🎒 What to pack — warm coat · sweaters and layers · scarf
December in Interlaken is cold, with average daytime highs around 4°C (39°F) and nighttime lows near -2°C (29°F). Expect roughly 91mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
☀️ About 57 hours of sunshine over the month (~2h/day).
🎒 What to pack — warm coat · sweaters and layers · scarf