Spiez climate — normals and trends
Spiez (Switzerland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 4.7 °C and it receives 1,737 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 (13.9 °C on average) and the coldest is January (-4.5 °C). Rainfall peaks in August.
Spiez averages 161 frost days, 0 hot days (≥ 30 °C) and 186 rainy days per year.
Spiez 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 186 to 136 per year over the period.
The hottest day of the period reached 30.6 °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
SpiezCanton of Bern
- coords
- 46.68°, 7.69°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.7°C
Average daily high
8.9°C
Average daily low
0.8°C
Annual rainfall
1,737mm
Sunshine / day
8.7h
Mean relative humidity
80%
Average peak wind
8.0km/h
Seasonal range
18.4°C
Frost days (< 0 °C)
161 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
186 d/yr
Annual snowfall
374.8 cm
Average feels-like high
7.1 °C
Average feels-like low
-2.0 °C
Average peak gust
34.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
13.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.66 · 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
30.6 °C
7 July 2015
Coldest day
-27.4 °C
19 January 1940
Wettest day
84 mm
27 September 1942
Windiest day
23.6 km/h
26 December 1999
Strongest gust
142.6 km/h
26 December 1999
Hottest feels-like
32.5 °C
7 July 2015
Coldest feels-like
-32.1 °C
19 January 1940
Snowiest day
31.0 cm
4 April 2019
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 | 1.9 °C | +2.8 °C | 127 mm | +15 mm |
| Feb | 3.7 °C | +2.8 °C | 52 mm | -56 mm |
| Mar | 7.7 °C | +3.3 °C | 73 mm | -44 mm |
| Apr | 11.7 °C | +3.8 °C | 133 mm | +2 mm |
| May | 13.2 °C | +0.9 °C | 187 mm | +12 mm |
| Jun | 21.6 °C | +5.5 °C | 141 mm | -50 mm |
| Jul | 18.5 °C | +0.1 °C | 265 mm | +67 mm |
| Aug | 20.6 °C | +2.6 °C | 181 mm | -20 mm |
| Sep | 15.0 °C | 0.0 °C | 265 mm | +119 mm |
| Oct | 10.2 °C | -0.2 °C | 128 mm | +13 mm |
| Nov | 5.4 °C | +1.4 °C | 133 mm | +8 mm |
| Dec | 3.6 °C | +3.7 °C | 36 mm | -84 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 Spiez?
Spiez has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 4.7 °C and it receives 1,737 mm of precipitation per year.
What is the hottest day ever recorded in Spiez?
The hottest day measured in Spiez between 1940 and 2025 was 7 July 2015, reaching 30.6 °C.
What is the coldest day in Spiez?
The coldest day measured in Spiez between 1940 and 2025 was 19 January 1940, at -27.4 °C.
Does it snow in Spiez?
Yes. Spiez gets on average 374.8 cm of snow per year and has around 161 frost days.
Has the climate of Spiez warmed?
Yes: Spiez warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Spiez?
The wettest day measured in Spiez between 1940 and 2025 was 27 September 1942, with 84 mm of rain in 24 hours.
What was the windiest day in Spiez?
The windiest day measured in Spiez between 1940 and 2025 was 26 December 1999, with winds reaching 23.6 km/h.
What is the warmest month in Spiez?
The warmest month in Spiez is July (13.9 °C on average); the coldest is January (-4.5 °C).
How much does it rain in Spiez?
Spiez receives on average 1,737 mm of precipitation per year, spread over about 186 rainy days.
Is it sunny in Spiez?
Spiez gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Spiez?
The heaviest 24-hour snowfall measured in Spiez between 1940 and 2025 was 4 April 2019, with 31.0 cm.
Are there tropical nights in Spiez?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Spiez.
What was the most extreme apparent temperature in Spiez?
In Spiez, between 1940 and 2025, the highest apparent temperature reached 32.5 °C on 7 July 2015, and the lowest was -32.1 °C on 19 January 1940.
Compare Spiez with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Spiez