Lausanne in Summer
In summer (June, July and August), Lausanne sees average daytime highs around 21°C and overnight lows near 14°C, with 339 mm of rain over about 37 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Over the season highs climb from about 18°C in early June to 21°C by late August. The sky is clear or mostly clear about 36% of the time across summer, and the air most often feels dry.
Summer is Lausanne's best season of the year to visit on our travel score. For the whole year in context, see Lausanne's year-round climate.
- Avg daytime high
- 21°C
- warmest season of the year
- Avg overnight low
- 14°C
- Rainfall
- 339 mm
- 37 wet days
- Avg wind
- 5 km/h
- Travel score
- 6.3
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Lausanne in Summer
Over the season highs climb from about 18°C in early June to 21°C by late August.
A typical summer day in Lausanne reaches about 21°C and drops to 14°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Lausanne
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Lausanne weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 5° / 0° | 108 | 12.7 | 6.8 | 8.8 | 0.0 |
| Feb | 6° / 0° | 96 | 11.3 | 6.9 | 10 | 0.3 |
| Mar | 9° / 2° | 94 | 12.3 | 4.4 | 11.6 | 1.8 |
| Apr | 13° / 5° | 90 | 12.3 | 2.2 | 13.3 | 3.2 |
| May | 16° / 9° | 120 | 14 | 0.4 | 14.8 | 4.7 |
| Jun | 20° / 13° | 106 | 12.8 | 0 | 15.5 | 5.9 |
| Jul | 22° / 15° | 118 | 12.2 | 0 | 15.2 | 6.6 |
| Aug | 22° / 15° | 116 | 12.4 | 0 | 14 | 6.5 |
| Sep | 18° / 12° | 108 | 11.7 | 0 | 12.4 | 5.7 |
| Oct | 14° / 9° | 101 | 12.4 | 0.3 | 10.7 | 3.9 |
| Nov | 9° / 4° | 116 | 13.1 | 3.2 | 9.2 | 1.6 |
| Dec | 6° / 1° | 125 | 13.5 | 6.6 | 8.4 | 0.2 |
Cloud cover in Summer
The sky is clear or mostly clear about 36% of the time across summer.
Chance of precipitation in Summer
Lausanne gets around 339 mm of rain over 37 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 18 min in early June to 13 h 12 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.5 kWh/m².
Is summer a good time to visit Lausanne?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Lausanne for sightseeing.
What to pack for Lausanne in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Lausanne sees daytime highs around 21°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 37 days see rain.
UV index in Lausanne in Summer
Clear-sky midday UV across summer averages around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Lausanne peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 5 | 7 | 8 | 9 | 7 | 5 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | Moderate | High | Very high | Very high | High | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 5 | Moderate |
| May | 7 | High |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 7 | High |
| Sep | 5 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Lausanne?
Lausanne sits at 46.5°N, 6.6°E, 453 m above sea level, in Switzerland. The nearest listed city is Pully, 2.0 km away.
Topography around Lausanne
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Lausanne.
Within 3 km, the terrain around Lausanne has significant variations in elevation — a maximum elevation change of 335 m around an average of 466 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 950 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,527 m.
The land around Lausanne is covered by artificial surfaces (35%), water (33%) and trees (29%) within 3 km, water (35%) and trees (24%) within 16 km, and trees (48%) and grassland (34%) within 80 km.
Switzerland travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / J
- 230 V · 50 Hz
- Prices
- ≈ 112% of US
- price level, 2025
- GDP per capita
- $114,769
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 0.6
- per 100k, 2023
- Road deaths
- 2.2
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- High
- EF EPI 564
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Lausanne (46.516°, 6.6328°, elevation 453 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.