Thonon-les-Bains climate — normals and trends
Thonon-les-Bains (France) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.2 °C and it receives 1,483 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 (16.5 °C on average) and the coldest is January (-2.1 °C). Rainfall peaks in May.
Thonon-les-Bains averages 126 frost days, 1 hot days (≥ 30 °C) and 169 rainy days per year.
Thonon-les-Bains has warmed by +3.0 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The number of frost days there went from about 154 to 98 per year over the period.
The hottest day of the period reached 34.4 °C (on 7 July 2015) and the coldest -25.1 °C (on 5 February 2012).
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
Thonon-les-BainsRhône-Alpes
- coords
- 46.37°, 6.48°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.2°C
Average daily high
11.6°C
Average daily low
3.0°C
Annual rainfall
1,483mm
Sunshine / day
8.8h
Mean relative humidity
78%
Average peak wind
8.6km/h
Seasonal range
18.6°C
Frost days (< 0 °C)
126 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
169 d/yr
Annual snowfall
214.5 cm
Average feels-like high
10.0 °C
Average feels-like low
0.5 °C
Average peak gust
30.9 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
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.71 · 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
34.4 °C
7 July 2015
Coldest day
-25.1 °C
5 February 2012
Wettest day
79 mm
10 June 1953
Windiest day
29.6 km/h
25 April 1972
Strongest gust
124.9 km/h
26 December 1999
Hottest feels-like
35.9 °C
26 June 2019
Coldest feels-like
-30.0 °C
5 February 2012
Snowiest day
32.8 cm
17 April 2005
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 | 5.3 °C | +3.7 °C | 187 mm | +74 mm |
| Feb | 6.6 °C | +3.1 °C | 52 mm | -53 mm |
| Mar | 10.5 °C | +3.3 °C | 59 mm | -49 mm |
| Apr | 15.0 °C | +4.0 °C | 113 mm | -1 mm |
| May | 16.6 °C | +1.3 °C | 150 mm | +0 mm |
| Jun | 25.1 °C | +6.1 °C | 134 mm | -15 mm |
| Jul | 22.8 °C | +1.6 °C | 133 mm | -3 mm |
| Aug | 24.9 °C | +4.1 °C | 98 mm | -43 mm |
| Sep | 17.6 °C | +0.1 °C | 211 mm | +98 mm |
| Oct | 12.5 °C | -0.4 °C | 181 mm | +75 mm |
| Nov | 8.0 °C | +1.5 °C | 148 mm | +25 mm |
| Dec | 6.0 °C | +3.5 °C | 28 mm | -95 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 Thonon-les-Bains?
Thonon-les-Bains has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.2 °C and it receives 1,483 mm of precipitation per year.
What is the hottest day ever recorded in Thonon-les-Bains?
The hottest day measured in Thonon-les-Bains between 1940 and 2025 was 7 July 2015, reaching 34.4 °C.
What is the coldest day in Thonon-les-Bains?
The coldest day measured in Thonon-les-Bains between 1940 and 2025 was 5 February 2012, at -25.1 °C.
Does it snow in Thonon-les-Bains?
Yes. Thonon-les-Bains gets on average 214.5 cm of snow per year and has around 126 frost days.
Has the climate of Thonon-les-Bains warmed?
Yes: Thonon-les-Bains warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Thonon-les-Bains?
The wettest day measured in Thonon-les-Bains between 1940 and 2025 was 10 June 1953, with 79 mm of rain in 24 hours.
What was the windiest day in Thonon-les-Bains?
The windiest day measured in Thonon-les-Bains between 1940 and 2025 was 25 April 1972, with winds reaching 29.6 km/h.
What is the warmest month in Thonon-les-Bains?
The warmest month in Thonon-les-Bains is July (16.5 °C on average); the coldest is January (-2.1 °C).
How much does it rain in Thonon-les-Bains?
Thonon-les-Bains receives on average 1,483 mm of precipitation per year, spread over about 169 rainy days.
Is it sunny in Thonon-les-Bains?
Thonon-les-Bains 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 Thonon-les-Bains?
The heaviest 24-hour snowfall measured in Thonon-les-Bains between 1940 and 2025 was 17 April 2005, with 32.8 cm.
Are there tropical nights in Thonon-les-Bains?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Thonon-les-Bains.
What was the most extreme apparent temperature in Thonon-les-Bains?
In Thonon-les-Bains, between 1940 and 2025, the highest apparent temperature reached 35.9 °C on 26 June 2019, and the lowest was -30.0 °C on 5 February 2012.
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Nearby cities
The climate around Thonon-les-Bains