Casteljaloux climate — normals and trends
Casteljaloux (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 13.2 °C and it receives 884 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 (21.3 °C on average) and the coldest is January (5.5 °C). Rainfall peaks in May.
Casteljaloux averages 29 frost days, 26 hot days (≥ 30 °C) and 133 rainy days per year.
Casteljaloux has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 36 to 22 per year over the period.
The hottest day of the period reached 42.6 °C (on 18 June 2022) and the coldest -16.4 °C (on 11 January 1967).
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
CasteljalouxNew Aquitaine
- coords
- 44.31°, 0.09°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.2°C
Average daily high
18.1°C
Average daily low
8.9°C
Annual rainfall
884mm
Sunshine / day
8.9h
Mean relative humidity
76%
Average peak wind
14.1km/h
Seasonal range
15.8°C
Frost days (< 0 °C)
29 d/yr
Hot days (≥ 30 °C)
26 d/yr
Rainy days (≥ 1 mm)
133 d/yr
Annual snowfall
3.6 cm
Average feels-like high
17.0 °C
Average feels-like low
7.1 °C
Average peak gust
32.3 km/h
Tropical nights (≥ 20 °C)
4 d/yr
Solar radiation
13.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.46 · 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
42.6 °C
18 June 2022
Coldest day
-16.4 °C
11 January 1967
Wettest day
54 mm
10 May 2020
Windiest day
50.0 km/h
27 December 1999
Strongest gust
124.2 km/h
24 January 2009
Hottest feels-like
44.5 °C
23 August 2023
Coldest feels-like
-20.9 °C
11 January 1967
Snowiest day
10.5 cm
25 January 2007
Sunniest day
14.8 h
29 June 2015
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 | 10.2 °C | +1.1 °C | 115 mm | +45 mm |
| Feb | 13.9 °C | +2.9 °C | 52 mm | -11 mm |
| Mar | 15.2 °C | +0.7 °C | 51 mm | -17 mm |
| Apr | 19.1 °C | +1.9 °C | 96 mm | +12 mm |
| May | 22.6 °C | +1.7 °C | 68 mm | -32 mm |
| Jun | 29.3 °C | +4.7 °C | 58 mm | -26 mm |
| Jul | 28.4 °C | +1.3 °C | 30 mm | -31 mm |
| Aug | 30.9 °C | +3.9 °C | 80 mm | +8 mm |
| Sep | 23.2 °C | -0.9 °C | 52 mm | -18 mm |
| Oct | 20.5 °C | +1.3 °C | 52 mm | -15 mm |
| Nov | 14.0 °C | +1.0 °C | 92 mm | +21 mm |
| Dec | 11.1 °C | +1.4 °C | 50 mm | -22 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 Casteljaloux?
Casteljaloux has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 884 mm of precipitation per year.
What is the hottest day ever recorded in Casteljaloux?
The hottest day measured in Casteljaloux between 1940 and 2025 was 18 June 2022, reaching 42.6 °C.
What is the coldest day in Casteljaloux?
The coldest day measured in Casteljaloux between 1940 and 2025 was 11 January 1967, at -16.4 °C.
Does it snow in Casteljaloux?
Yes. Casteljaloux gets on average 3.6 cm of snow per year and has around 29 frost days.
Has the climate of Casteljaloux warmed?
Yes: Casteljaloux warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Casteljaloux?
The wettest day measured in Casteljaloux between 1940 and 2025 was 10 May 2020, with 54 mm of rain in 24 hours.
What was the windiest day in Casteljaloux?
The windiest day measured in Casteljaloux between 1940 and 2025 was 27 December 1999, with winds reaching 50.0 km/h.
What is the warmest month in Casteljaloux?
The warmest month in Casteljaloux is July (21.3 °C on average); the coldest is January (5.5 °C).
How much does it rain in Casteljaloux?
Casteljaloux receives on average 884 mm of precipitation per year, spread over about 133 rainy days.
Is it sunny in Casteljaloux?
Casteljaloux 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 Casteljaloux?
The heaviest 24-hour snowfall measured in Casteljaloux between 1940 and 2025 was 25 January 2007, with 10.5 cm.
Are there tropical nights in Casteljaloux?
Yes: Casteljaloux has on average 4 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Casteljaloux?
In Casteljaloux, between 1940 and 2025, the highest apparent temperature reached 44.5 °C on 23 August 2023, and the lowest was -20.9 °C on 11 January 1967.
Compare Casteljaloux with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Casteljaloux