Sierre in Summer
In summer (June, July and August), Sierre sees average daytime highs around 17°C and overnight lows near 6°C, with 377 mm of precipitation over about 47 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 13°C in early June to 16°C by late August. The sky is clear or mostly clear about 30% of the time across summer, and the air most often feels dry.
Summer is Sierre's best season of the year to visit on our travel score. For the whole year in context, see Sierre's year-round climate.
- Avg daytime high
- 17°C
- warmest season of the year
- Avg overnight low
- 6°C
- Precipitation
- 377 mm
- 47 wet days
- Avg wind
- 4 km/h
- Travel score
- 4.7
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Sierre in Summer
Over the season highs climb from about 13°C in early June to 16°C by late August.
A typical summer day in Sierre reaches about 17°C and drops to 6°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Sierre
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.
Sierre 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° / -14° | 118 | 12.2 | 13.1 | 8.8 | 0.0 |
| Feb | -2° / -12° | 98 | 11.4 | 11.8 | 10 | 0.0 |
| Mar | 2° / -7° | 101 | 13.1 | 13.1 | 11.6 | 0.0 |
| Apr | 6° / -3° | 106 | 13.5 | 10.9 | 13.3 | 0.4 |
| May | 11° / 1° | 138 | 16.4 | 6.2 | 14.7 | 2.1 |
| Jun | 15° / 5° | 131 | 16.7 | 1.5 | 15.5 | 3.9 |
| Jul | 17° / 7° | 127 | 16.1 | 0.8 | 15.2 | 5.0 |
| Aug | 17° / 7° | 119 | 13.8 | 0.7 | 14 | 5.2 |
| Sep | 13° / 3° | 106 | 12.8 | 2.4 | 12.3 | 3.6 |
| Oct | 9° / -1° | 102 | 12.3 | 6.2 | 10.7 | 1.6 |
| Nov | 1° / -8° | 122 | 13.1 | 11.6 | 9.2 | 0.0 |
| Dec | -4° / -13° | 125 | 13.1 | 14 | 8.5 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 30% of the time across summer.
Chance of precipitation in Summer
Sierre gets around 377 mm of rain and snow over 47 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 4 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 5.7 kWh/m².
Is summer a good time to visit Sierre?
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 Sierre for sightseeing.
What to pack for Sierre in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Sierre sees daytime highs around 17°C and nights near 6°C. Pack rain gear and sun protection. Worth having: a warm layer. About 47 days see rain.
UV index in Sierre in Summer
Clear-sky midday UV across summer averages around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sierre peaks around July 16 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 | 3 | 5 | 7 | 8 | 8 | 9 | 8 | 6 | 4 | 2 | 1 |
| Level | Low | Moderate | High | High | Very high | Very high | Very high | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | High |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Sierre?
Sierre sits at 46.3°N, 7.5°E, 528 m above sea level, in Switzerland. The nearest listed city is Sitten, 16 km away.
Topography around Sierre
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sierre.
Within 3 km, the terrain around Sierre has large variations in elevation — a maximum elevation change of 1,154 m around an average of 747 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,920 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,591 m.
The land around Sierre is covered by trees (62%) and artificial surfaces (20%) within 3 km, trees (40%) and grassland (33%) within 16 km, and trees (40%) and grassland (35%) 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 Sierre (46.2919°, 7.5356°, elevation 528 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.