🇨🇭 Weather in Zermatt in May
This is what the weather in Zermatt (Valais, Switzerland) was like in May in 2017–2026.
Key facts at a glance
Avg. daytime high
8.6 °C
5.6 °C – 11.3 °C
Avg. night-time low
-0.2 °C
-3.5 °C – 2.3 °C
Avg. rain days in period
19.7
64 % of days · ≥ 1.0 mm
Avg. precipitation in period
102 mm
58.0 mm – 190 mm
Avg. cloud cover
70 %
This data source has no sunshine hours – average cloud cover shown instead.
Avg. sea temperature
–
No sea nearby – no sea temperature.
Extremes: Highest temperature 18.4 °C (26 May 2026) · Lowest temperature -11.3 °C (6 May 2019) · Avg. daily peak wind 12 km/h
Weather mix of all days
- 36Sunny
- 53Partly cloudy
- 24Cloudy
- 124Light rain
- 73Rain
Summary
- On average 8.6 °C during the day and -0.2 °C at night.
- On average 19.7 rain days (Rain day = at least 1.0 mm of precipitation) with 102 mm of precipitation in total.
- Prevailing: Light rain.
- Warmest year: 2022 (avg. 11.3 °C), coolest: 2021 (avg. 5.6 °C).
- Wettest year: 2024 (190 mm), driest: 2026 (58.0 mm).
- Extremes: 18.4 °C on 26 May 2026 and -11.3 °C on 6 May 2019.
Overall values from all 10 years. How is this calculated?
Charts
Temperatures per year
Average over your travel period
Precipitation & rain days
Year by year
2026
Avg. max9.9°Avg. min0.7°- Rain days
- 12 Rain days
- Precipitation
- 58.0 mm
- Avg. cloud cover
- 63 % cloudy
- Sea temperature
- –
Max 18.4 °C · Min -6.8 °C
2025
Avg. max8.9°Avg. min0.0°- Rain days
- 20 Rain days
- Precipitation
- 97.9 mm
- Avg. cloud cover
- 69 % cloudy
- Sea temperature
- –
Max 16.9 °C · Min -3.7 °C
2024
Avg. max7.8°Avg. min-0.1°- Rain days
- 26 Rain days
- Precipitation
- 190 mm
- Avg. cloud cover
- 82 % cloudy
- Sea temperature
- –
Max 13.3 °C · Min -4.5 °C
2023
Avg. max8.6°Avg. min0.1°- Rain days
- 25 Rain days
- Precipitation
- 103 mm
- Avg. cloud cover
- 74 % cloudy
- Sea temperature
- –
Max 14.5 °C · Min -3.7 °C
2022
Avg. max11.3°Avg. min2.3°- Rain days
- 16 Rain days
- Precipitation
- 74.1 mm
- Avg. cloud cover
- 64 % cloudy
- Sea temperature
- –
Max 16.7 °C · Min -3.1 °C
2021
Avg. max5.6°Avg. min-3.5°- Rain days
- 19 Rain days
- Precipitation
- 110 mm
- Avg. cloud cover
- 78 % cloudy
- Sea temperature
- –
Max 13.0 °C · Min -7.5 °C
2020
Avg. max10.2°Avg. min0.4°- Rain days
- 17 Rain days
- Precipitation
- 103 mm
- Avg. cloud cover
- 56 % cloudy
- Sea temperature
- –
Max 14.4 °C · Min -5.3 °C
2019
Avg. max6.0°Avg. min-3.0°- Rain days
- 18 Rain days
- Precipitation
- 90.0 mm
- Avg. cloud cover
- 72 % cloudy
- Sea temperature
- –
Max 12.5 °C · Min -11.3 °C
2018
Avg. max8.9°Avg. min1.3°- Rain days
- 25 Rain days
- Precipitation
- 105 mm
- Avg. cloud cover
- 75 % cloudy
- Sea temperature
- –
Max 13.9 °C · Min -2.8 °C
2017
Avg. max9.2°Avg. min0.0°- Rain days
- 19 Rain days
- Precipitation
- 92.1 mm
- Avg. cloud cover
- 68 % cloudy
- Sea temperature
- –
Max 16.4 °C · Min -7.8 °C
Frequently asked questions
- How warm is it in Zermatt in May?
- Daytime highs averaged 8.6 °C, night-time lows -0.2 °C. The highest value of the past 10 years was 18.4 °C (26 May 2026), the lowest -11.3 °C (6 May 2019).
- How often does it rain in Zermatt in May?
- On average there were 19.7 rain days (at least 1 mm) with 102 mm of precipitation in total.
Check your exact travel dates
Choose your travel period – we show the weather for exactly those days.
Other destinations in May
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)