Zermatt climate — normals and trends
Zermatt (Switzerland) has a tundra climate (ET) under the Köppen-Geiger classification. Its mean annual temperature is -1.7 °C and it receives 1,619 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (8.6 °C on average) and the coldest is January (-11.9 °C). Rainfall peaks in May.
Zermatt averages 259 frost days, 0 hot days (≥ 30 °C) and 181 rainy days per year.
Zermatt has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.
The number of frost days there went from about 286 to 232 per year over the period.
The hottest day of the period reached 23.0 °C (on 27 June 2019) and the coldest -34.4 °C (on 8 January 1985).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
ZermattValais
- coords
- 46.02°, 7.75°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
-1.7°C
Average daily high
2.1°C
Average daily low
-5.6°C
Annual rainfall
1,619mm
Sunshine / day
9.1h
Mean relative humidity
77%
Average peak wind
6.1km/h
Seasonal range
20.5°C
Frost days (< 0 °C)
259 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
181 d/yr
Annual snowfall
686.5 cm
Average feels-like high
-0.4 °C
Average feels-like low
-9.0 °C
Average peak gust
38.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
15.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.62 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
23.0 °C
27 June 2019
Coldest day
-34.4 °C
8 January 1985
Wettest day
147 mm
24 September 1993
Windiest day
17.9 km/h
28 December 1999
Strongest gust
154.1 km/h
27 February 1990
Hottest feels-like
23.2 °C
25 June 2019
Coldest feels-like
-39.1 °C
14 February 1940
Snowiest day
74.7 cm
21 March 1971
Sunniest day
15.0 h
28 May 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -6.1 °C | +2.7 °C | 116 mm | +27 mm |
| Feb | -3.1 °C | +3.3 °C | 33 mm | -56 mm |
| Mar | -0.8 °C | +2.0 °C | 102 mm | -5 mm |
| Apr | 3.7 °C | +3.2 °C | 298 mm | +154 mm |
| May | 6.2 °C | +1.2 °C | 177 mm | -0 mm |
| Jun | 15.6 °C | +5.9 °C | 175 mm | +21 mm |
| Jul | 13.7 °C | +0.5 °C | 193 mm | +36 mm |
| Aug | 15.5 °C | +2.5 °C | 183 mm | +6 mm |
| Sep | 9.8 °C | +0.2 °C | 224 mm | +84 mm |
| Oct | 4.6 °C | +0.6 °C | 87 mm | -59 mm |
| Nov | -1.9 °C | +1.6 °C | 69 mm | -70 mm |
| Dec | -2.9 °C | +5.2 °C | 75 mm | -26 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Zermatt?
Zermatt has a tundra climate (Köppen ET). Over 1940-2025, the average annual temperature is -1.7 °C and it receives 1,619 mm of precipitation per year.
What is the hottest day ever recorded in Zermatt?
The hottest day measured in Zermatt between 1940 and 2025 was 27 June 2019, reaching 23.0 °C.
What is the coldest day in Zermatt?
The coldest day measured in Zermatt between 1940 and 2025 was 8 January 1985, at -34.4 °C.
Does it snow in Zermatt?
Yes. Zermatt gets on average 686.5 cm of snow per year and has around 259 frost days.
Has the climate of Zermatt warmed?
Yes: Zermatt warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Zermatt?
The wettest day measured in Zermatt between 1940 and 2025 was 24 September 1993, with 147 mm of rain in 24 hours.
What was the windiest day in Zermatt?
The windiest day measured in Zermatt between 1940 and 2025 was 28 December 1999, with winds reaching 17.9 km/h.
What is the warmest month in Zermatt?
The warmest month in Zermatt is July (8.6 °C on average); the coldest is January (-11.9 °C).
How much does it rain in Zermatt?
Zermatt receives on average 1,619 mm of precipitation per year, spread over about 181 rainy days.
Is it sunny in Zermatt?
Zermatt gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Zermatt?
The heaviest 24-hour snowfall measured in Zermatt between 1940 and 2025 was 21 March 1971, with 74.7 cm.
Are there tropical nights in Zermatt?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Zermatt.
What was the most extreme apparent temperature in Zermatt?
In Zermatt, between 1940 and 2025, the highest apparent temperature reached 23.2 °C on 25 June 2019, and the lowest was -39.1 °C on 14 February 1940.
Compare Zermatt with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Zermatt