Interlaken Weather
A month-by-month look at temperature, rainfall and what to pack in Interlaken. The annual average is 14°C high / 5°C low — hottest in July (25°C) and coldest in January (-3°C).
Interlaken Weather at a Glance
As of 2026A quick summary of Interlaken's year-round climate and the best time to visit.
- Annual average
- 14° / 5°
- Best time to visit
- July, September, June
- Hottest month
- July (25°C)
- Coldest month
- January (-3°C)
- Wettest month
- June (140mm)
- Driest month
- February (65mm)
As of 2026, Interlaken's weather averages 14°C high / 5°C low across the year, and the best time to visit for stable temperatures, rainfall and crowds is July, September, June. The hottest month is July (25°C), the coldest is January (-3°C), and the wettest is June (140mm).
Best Time to Visit Interlaken
Peak summer + crowds. All mountains accessible. Lake swimming. Long daylight. Hotels triple. Pre-book everything 2-3 months ahead.
BEST MONTH after July — fewer crowds + autumn foliage + still all mountains operating + Jungfraujoch perfect visibility.
All mountains accessible. Long daylight. Peak hiking season starts. Tourist crowds growing.
Interlaken Weather Month by Month
Tap any month for a detailed guide with what to wear, sunrise/sunset and air quality.
| Month | High/Low | Rain | Rainy days | Crowds | |
|---|---|---|---|---|---|
| January | 3° / -3° | 75mm | 10 | Busy | Details → |
| February | 5° / -2° | 65mm | 9 | Busy | Details → |
| March | 10° / 1° | 80mm | 11 | Moderate | Details → |
| April | 14° / 4° | 100mm | 13 | Quiet | Details → |
| May | 18° / 8° | 130mm | 14 | Moderate | Details → |
| June | 22° / 11° | 140mm | 14 | Busy | Details → |
| July | 25° / 13° | 130mm | 12 | Very busy | Details → |
| August | 24° / 12° | 130mm | 13 | Very busy | Details → |
| September | 20° / 10° | 100mm | 11 | Busy | Details → |
| October | 14° / 5° | 85mm | 10 | Moderate | Details → |
| November | 7° / 0° | 100mm | 12 | Quiet | Details → |
| December | 4° / -2° | 75mm | 10 | Busy | Details → |
What to Wear in Interlaken by Season
Spring variable. Light coat + sweater + waterproof.
Summer. T-shirt + shorts + UV.
Cool autumn. Warm coat + sweater.
Cold. Heavy coat + thermal + boots.
Interlaken Weather FAQ
What is the best time to visit Interlaken? +
For weather, July, September, June are the most comfortable months. Highs sit around 25°C with relatively stable rainfall and crowds.
What are the hottest and coldest months in Interlaken? +
The hottest month is July with an average high of 25°C, and the coldest is January with an average low of -3°C. The annual average is 14°C high / 5°C low.
When does it rain most in Interlaken? +
The wettest month is June (140mm over about 14 rainy days) and the driest is February (65mm). Total annual rainfall is roughly 1210mm.
What should I pack for Interlaken? +
Spring (Mar–May) averages 14/4°C — Spring variable. Light coat + sweater + waterproof. Summer (Jun–Aug) averages 24/12°C — Summer. T-shirt + shorts + UV. Autumn (Sep–Nov) averages 14/5°C — Cool autumn. Warm coat + sweater. Winter (Dec–Feb) averages 4/-2°C — Cold. Heavy coat + thermal + boots.
What is the weather in Interlaken this month (June)? +
June averages 22°C high / 11°C low with 140mm rainfall over about 14 rainy days. Crowds are busy and prices are high.
Keep Planning Your Interlaken Trip
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.