Aix-les-Bains climate — normals and trends
Aix-les-Bains (France) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.6 °C and it receives 1,471 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 (19.0 °C on average) and the coldest is January (-0.1 °C). Rainfall peaks in May.
Aix-les-Bains averages 93 frost days, 5 hot days (≥ 30 °C) and 159 rainy days per year.
Aix-les-Bains has warmed by +3.2 °C between 1940 and 2025, or +0.38 °C per decade. This trend is statistically significant.
The number of frost days there went from about 126 to 60 per year over the period.
The hottest day of the period reached 38.0 °C (on 7 July 2015) and the coldest -27.4 °C (on 15 February 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
Aix-les-BainsRhône-Alpes
- coords
- 45.69°, 5.91°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.6°C
Average daily high
13.9°C
Average daily low
5.0°C
Annual rainfall
1,471mm
Sunshine / day
8.9h
Mean relative humidity
76%
Average peak wind
7.5km/h
Seasonal range
19.1°C
Frost days (< 0 °C)
93 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
159 d/yr
Annual snowfall
136.6 cm
Average feels-like high
12.7 °C
Average feels-like low
3.1 °C
Average peak gust
28.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
13.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.2 °C
since 1940
+0.4 °C per decade · r² = 0.72 · 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
38.0 °C
7 July 2015
Coldest day
-27.4 °C
15 February 1940
Wettest day
81 mm
31 July 1977
Windiest day
23.0 km/h
17 April 1991
Strongest gust
116.6 km/h
28 December 1999
Hottest feels-like
39.0 °C
27 June 2019
Coldest feels-like
-32.2 °C
15 February 1940
Snowiest day
31.6 cm
17 April 2005
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 | 7.7 °C | +4.0 °C | 213 mm | +91 mm |
| Feb | 9.4 °C | +3.6 °C | 50 mm | -64 mm |
| Mar | 13.1 °C | +3.0 °C | 72 mm | -44 mm |
| Apr | 17.7 °C | +3.8 °C | 122 mm | +5 mm |
| May | 19.2 °C | +1.3 °C | 142 mm | +2 mm |
| Jun | 27.3 °C | +6.0 °C | 119 mm | -12 mm |
| Jul | 25.1 °C | +1.4 °C | 100 mm | -22 mm |
| Aug | 27.3 °C | +4.1 °C | 77 mm | -50 mm |
| Sep | 19.5 °C | -0.2 °C | 164 mm | +58 mm |
| Oct | 14.7 °C | -0.2 °C | 200 mm | +91 mm |
| Nov | 10.2 °C | +1.9 °C | 164 mm | +31 mm |
| Dec | 8.4 °C | +4.0 °C | 29 mm | -106 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 Aix-les-Bains?
Aix-les-Bains has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 9.6 °C and it receives 1,471 mm of precipitation per year.
What is the hottest day ever recorded in Aix-les-Bains?
The hottest day measured in Aix-les-Bains between 1940 and 2025 was 7 July 2015, reaching 38.0 °C.
What is the coldest day in Aix-les-Bains?
The coldest day measured in Aix-les-Bains between 1940 and 2025 was 15 February 1940, at -27.4 °C.
Does it snow in Aix-les-Bains?
Yes. Aix-les-Bains gets on average 136.6 cm of snow per year and has around 93 frost days.
Has the climate of Aix-les-Bains warmed?
Yes: Aix-les-Bains warmed by +3.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Aix-les-Bains?
The wettest day measured in Aix-les-Bains between 1940 and 2025 was 31 July 1977, with 81 mm of rain in 24 hours.
What was the windiest day in Aix-les-Bains?
The windiest day measured in Aix-les-Bains between 1940 and 2025 was 17 April 1991, with winds reaching 23.0 km/h.
What is the warmest month in Aix-les-Bains?
The warmest month in Aix-les-Bains is July (19.0 °C on average); the coldest is January (-0.1 °C).
How much does it rain in Aix-les-Bains?
Aix-les-Bains receives on average 1,471 mm of precipitation per year, spread over about 159 rainy days.
Is it sunny in Aix-les-Bains?
Aix-les-Bains gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.
What is the biggest single-day snowfall in Aix-les-Bains?
The heaviest 24-hour snowfall measured in Aix-les-Bains between 1940 and 2025 was 17 April 2005, with 31.6 cm.
Are there tropical nights in Aix-les-Bains?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Aix-les-Bains.
What was the most extreme apparent temperature in Aix-les-Bains?
In Aix-les-Bains, between 1940 and 2025, the highest apparent temperature reached 39.0 °C on 27 June 2019, and the lowest was -32.2 °C on 15 February 1940.
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Nearby cities
The climate around Aix-les-Bains