Thun climate — normals and trends
Thun (Switzerland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.3 °C and it receives 1,624 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 (15.5 °C on average) and the coldest is January (-3.0 °C). Rainfall peaks in July.
Thun averages 137 frost days, 0 hot days (≥ 30 °C) and 179 rainy days per year.
Thun has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 164 to 110 per year over the period.
The hottest day of the period reached 33.2 °C (on 7 July 2015) and the coldest -27.4 °C (on 19 January 1940).
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
ThunCanton of Bern
- coords
- 46.75°, 7.62°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.3°C
Average daily high
10.6°C
Average daily low
2.2°C
Annual rainfall
1,624mm
Sunshine / day
8.8h
Mean relative humidity
79%
Average peak wind
8.9km/h
Seasonal range
18.5°C
Frost days (< 0 °C)
137 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
179 d/yr
Annual snowfall
274.0 cm
Average feels-like high
8.9 °C
Average feels-like low
-0.4 °C
Average peak gust
31.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
13.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.67 · 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
33.2 °C
7 July 2015
Coldest day
-27.4 °C
19 January 1940
Wettest day
79 mm
27 September 1942
Windiest day
27.5 km/h
3 January 2018
Strongest gust
133.9 km/h
26 December 1999
Hottest feels-like
35.6 °C
7 July 2015
Coldest feels-like
-32.2 °C
19 January 1940
Snowiest day
26.5 cm
26 December 2013
Sunniest day
15.0 h
20 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 | 3.8 °C | +3.0 °C | 125 mm | +19 mm |
| Feb | 5.2 °C | +2.6 °C | 48 mm | -55 mm |
| Mar | 9.3 °C | +2.9 °C | 63 mm | -47 mm |
| Apr | 13.6 °C | +3.5 °C | 124 mm | -2 mm |
| May | 15.2 °C | +0.8 °C | 177 mm | +7 mm |
| Jun | 23.4 °C | +5.5 °C | 125 mm | -53 mm |
| Jul | 20.3 °C | +0.1 °C | 236 mm | +56 mm |
| Aug | 22.4 °C | +2.7 °C | 163 mm | -16 mm |
| Sep | 16.4 °C | -0.1 °C | 252 mm | +119 mm |
| Oct | 11.4 °C | -0.5 °C | 126 mm | +18 mm |
| Nov | 7.0 °C | +1.4 °C | 135 mm | +17 mm |
| Dec | 4.9 °C | +3.3 °C | 33 mm | -82 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 Thun?
Thun has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.3 °C and it receives 1,624 mm of precipitation per year.
What is the hottest day ever recorded in Thun?
The hottest day measured in Thun between 1940 and 2025 was 7 July 2015, reaching 33.2 °C.
What is the coldest day in Thun?
The coldest day measured in Thun between 1940 and 2025 was 19 January 1940, at -27.4 °C.
Does it snow in Thun?
Yes. Thun gets on average 274.0 cm of snow per year and has around 137 frost days.
Has the climate of Thun warmed?
Yes: Thun warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Thun?
The wettest day measured in Thun between 1940 and 2025 was 27 September 1942, with 79 mm of rain in 24 hours.
What was the windiest day in Thun?
The windiest day measured in Thun between 1940 and 2025 was 3 January 2018, with winds reaching 27.5 km/h.
What is the warmest month in Thun?
The warmest month in Thun is July (15.5 °C on average); the coldest is January (-3.0 °C).
How much does it rain in Thun?
Thun receives on average 1,624 mm of precipitation per year, spread over about 179 rainy days.
Is it sunny in Thun?
Thun gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Thun?
The heaviest 24-hour snowfall measured in Thun between 1940 and 2025 was 26 December 2013, with 26.5 cm.
Are there tropical nights in Thun?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Thun.
What was the most extreme apparent temperature in Thun?
In Thun, between 1940 and 2025, the highest apparent temperature reached 35.6 °C on 7 July 2015, and the lowest was -32.2 °C on 19 January 1940.
Compare Thun with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Thun