How warm is it in Zermatt in August?

Daytime highs averaged 15.7 °C, night-time lows 6.3 °C. The highest value of the past 10 years was 22.0 °C (10 Aug 2024), the lowest -3.8 °C (26 Aug 2018).

How often does it rain in Zermatt in August?

On average there were 13.5 rain days (at least 1 mm) with 91.3 mm of precipitation in total.

🇨🇭 Weather in Zermatt in August

This is what the weather in Zermatt (Valais, Switzerland) was like in August in 2017–2026.

Key facts at a glance

Prevailing weather: Partly cloudy

Avg. daytime high

15.7 °C

14.0 °C – 17.3 °C

Avg. night-time low

6.3 °C

4.3 °C – 8.2 °C

Avg. rain days in period

13.5

44 % of days · ≥ 1.0 mm

Avg. precipitation in period

91.3 mm

57.0 mm – 126 mm

Avg. sunshine per day

n/a

Sunshine duration is not available from this data source.

Avg. sea temperature

–

No sea nearby – no sea temperature.

Extremes: Highest temperature 22.0 °C (10 Aug 2024) · Lowest temperature -3.8 °C (26 Aug 2018) · Avg. daily peak wind 11 km/h

Weather mix of all days

59Sunny
82Partly cloudy
17Cloudy
78Light rain
57Rain

Summary

On average 15.7 °C during the day and 6.3 °C at night.
On average 13.5 rain days (Rain day = at least 1.0 mm of precipitation) with 91.3 mm of precipitation in total.
Prevailing: Partly cloudy.
Warmest year: 2024 (avg. 17.3 °C), coolest: 2021 (avg. 14.0 °C).
Wettest year: 2020 (126 mm), driest: 2021 (57.0 mm).
Extremes: 22.0 °C on 10 Aug 2024 and -3.8 °C on 26 Aug 2018.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max17.2°Avg. min7.7°
Rain days
14 Rain days
Precipitation
75.3 mm
Avg. sunshine per day
n/a
Sea temperature
–
Max 21.0 °C · Min 1.6 °C
2025
Avg. max15.7°Avg. min6.3°
Rain days
9 Rain days
Precipitation
97.9 mm
Avg. cloud cover
44 % cloudy
Sea temperature
–
Max 21.1 °C · Min 1.3 °C
2024
Avg. max17.3°Avg. min8.2°
Rain days
12 Rain days
Precipitation
77.4 mm
Avg. cloud cover
48 % cloudy
Sea temperature
–
Max 22.0 °C · Min 4.9 °C
2023
Avg. max15.2°Avg. min6.0°
Rain days
14 Rain days
Precipitation
122 mm
Avg. cloud cover
62 % cloudy
Sea temperature
–
Max 21.9 °C · Min -1.4 °C
2022
Avg. max16.4°Avg. min6.9°
Rain days
14 Rain days
Precipitation
67.9 mm
Avg. cloud cover
48 % cloudy
Sea temperature
–
Max 20.3 °C · Min 3.6 °C
2021
Avg. max14.0°Avg. min4.3°
Rain days
10 Rain days
Precipitation
57.0 mm
Avg. cloud cover
60 % cloudy
Sea temperature
–
Max 19.9 °C · Min -1.4 °C
2020
Avg. max15.1°Avg. min5.4°
Rain days
14 Rain days
Precipitation
126 mm
Avg. cloud cover
59 % cloudy
Sea temperature
–
Max 19.7 °C · Min -2.2 °C
2019
Avg. max15.5°Avg. min6.1°
Rain days
15 Rain days
Precipitation
114 mm
Avg. cloud cover
56 % cloudy
Sea temperature
–
Max 19.5 °C · Min -0.1 °C
2018
Avg. max15.5°Avg. min6.5°
Rain days
23 Rain days
Precipitation
88.9 mm
Avg. cloud cover
55 % cloudy
Sea temperature
–
Max 20.4 °C · Min -3.8 °C
2017
Avg. max15.1°Avg. min5.7°
Rain days
10 Rain days
Precipitation
87.6 mm
Avg. cloud cover
58 % cloudy
Sea temperature
–
Max 19.4 °C · Min -0.7 °C

Frequently asked questions

How warm is it in Zermatt in August?: Daytime highs averaged 15.7 °C, night-time lows 6.3 °C. The highest value of the past 10 years was 22.0 °C (10 Aug 2024), the lowest -3.8 °C (26 Aug 2018).
How often does it rain in Zermatt in August?: On average there were 13.5 rain days (at least 1 mm) with 91.3 mm of precipitation in total.

Check your exact travel dates

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Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)