Switzerland Swiss Alps Weather in August — Climate Guide
August in Swiss Alps is high
Swiss Alps Weather in August — Quick Answer
As of 2026- Avg temp
- 23° / 12°
- Rainfall
- 150mm · 14 days
- Crowds
- Very busy
As of 2026, Swiss Alps in August averages a high of 23°C and low of 12°C with 150mm of rain over about 14 days. Peak summer (around 23°C/12°C) like July. Summer clothes low down, warm windproof layers for the cold summits. Carry a rain jacket for afternoon storms.
August is high for Swiss Alps.
August continues peak summer, much like July, with everything open and the Alps at their busiest. Valleys are warm (around 23°C/12°C) and the hiking is superb across both headline regions.
Swiss National Day (August 1) brings fireworks and village celebrations — a festive time to be in the mountains. All trails, lifts, and mountain restaurants run, and the lakes are warm enough to swim.
Travel score
Swiss Alps August Weather Stats
Avg High
23°C
Avg Low
12°C
Rainy Days
14
150mm total
Sunshine
6h
Daily avg
Humidity
73%
comfortable
UV Index
6
High
Wind
9 km/h
Gusts 22
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
11 μg/m³
PM10
19 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
23°C
Nighttime
12°C
Humidity and wind affect how the actual temperature feels.
Wind
9 km/h
Max gust 22 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Everything open — peak hiking and operation
- Swiss National Day celebrations (Aug 1)
- Warm lakes for swimming
- Long, warm days
Cons
- Busiest and most expensive (European holiday peak)
- Crowded summits and trails
- Frequent afternoon thunderstorms
- Accommodation scarce and dear
August Events & Festivals
- Peak summer continues — very busy and pricey
- Swiss National Day (Aug 1) — fireworks, celebrations
- All trails and lifts fully open
- European holiday peak; afternoon thunderstorms
Swiss Alps in August — Full Picture
August continues peak summer, much like July, with everything open and the Alps at their busiest. Valleys are warm (around 23°C/12°C) and the hiking is superb across both headline regions.
Swiss National Day (August 1) brings fireworks and village celebrations — a festive time to be in the mountains. All trails, lifts, and mountain restaurants run, and the lakes are warm enough to swim.
The trade-offs match July: top crowds and prices, busy summits, and frequent afternoon thunderstorms — hike early and stay flexible. August can be marginally cloudier and stormier than July in some years.
Note: this is the European holiday peak, so book accommodation and Jungfraujoch reservations far ahead. The high summits stay cold and snowy even now. Verify current fares and reservation rules.
What to Wear & What to Pack
Peak summer (around 23°C/12°C) like July. Summer clothes low down, warm windproof layers for the cold summits. Carry a rain jacket for afternoon storms.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
13.3°C
3.3°C
12.3/mo
Summer (Jun·Jul·Aug)
Current22.7°C
11.3°C
14/mo
Autumn (Sep·Oct·Nov)
13.7°C
5°C
10.7/mo
Winter (Dec·Jan·Feb)
4°C
-2.3°C
10.7/mo
Swiss Alps Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 3° | -3° | 11d·70mm | 2h | 82% | 1 | Busy | Peak | |
| 5° | -2° | 10d·65mm | 3h | 79% | 2 | Busy | Peak | |
| 9° | 0° | 11d·75mm | 4h | 74% | 3 | Moderate | Shoulder | |
| 13° | 3° | 12d·85mm | 5h | 71% | 4 | Quiet | Low season | |
| 18° | 7° | 14d·110mm | 5.5h | 71% | 5 | Moderate | Shoulder | |
| 21° | 10° | 14d·130mm | 6h | 71% | 6 | Busy | Peak | |
| July (Best) | 24° | 12° | 14d·145mm | 6.5h | 70% | 7 | Very busy | Peak |
| August (Best) | 23° | 12° | 14d·150mm | 6h | 73% | 6 | Very busy | Peak |
| 19° | 9° | 11d·100mm | 5.5h | 75% | 5 | Busy | Shoulder | |
| 14° | 5° | 10d·80mm | 4h | 78% | 3 | Moderate | Low season | |
| 8° | 1° | 11d·80mm | 2.5h | 82% | 1 | Quiet | Low season | |
| 4° | -2° | 11d·75mm | 2h | 83% | 1 | Busy | Peak |
View Other Months
Swiss Alps August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Swiss Alps?
Swiss Alps in August is high. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Swiss Alps in August?
Swiss Alps August averages a high of 23°C and a low of 12°C.
Does it rain much in Swiss Alps in August?
Swiss Alps August averages 150mm of rainfall over about 14 rainy days.
What should I wear in Swiss Alps in August?
Peak summer (around 23°C/12°C) like July. Summer clothes low down, warm windproof layers for the cold summits. Carry a rain jacket for afternoon storms.
What time are sunrise and sunset in Swiss Alps in August?
Swiss Alps August sunrise is 06:20 and sunset is 20:40, with 14h 20min of daylight.
What's the air quality like in Swiss Alps in August?
Swiss Alps August air quality (AQI) averages 31, rated Good. PM2.5 averages 11μg/m³.
What activities are recommended in Swiss Alps in August?
In August, Swiss Alps is great for Mountain hiking (peak season), Summit railways (Jungfraujoch, Gornergrat), Lake swimming and boats.
Is August peak season in Swiss Alps?
Swiss Alps August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Swiss Alps
View Other Months
Planning a August trip to Swiss Alps?
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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.