Portes-lès-Valence climate — normals and trends
Portes-lès-Valence (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 11.3 °C and it receives 903 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 (20.6 °C on average) and the coldest is January (2.6 °C). Rainfall peaks in October.
Portes-lès-Valence averages 50 frost days, 13 hot days (≥ 30 °C) and 124 rainy days per year.
Portes-lès-Valence has warmed by +2.6 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The number of frost days there went from about 68 to 32 per year over the period.
The hottest day of the period reached 38.9 °C (on 12 August 2025) and the coldest -19.1 °C (on 5 February 1963).
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
Portes-lès-ValenceRhône-Alpes
- coords
- 44.88°, 4.87°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.3°C
Average daily high
15.6°C
Average daily low
7.4°C
Annual rainfall
903mm
Sunshine / day
9.6h
Mean relative humidity
74%
Average peak wind
16.6km/h
Seasonal range
18.0°C
Frost days (< 0 °C)
50 d/yr
Hot days (≥ 30 °C)
13 d/yr
Rainy days (≥ 1 mm)
124 d/yr
Annual snowfall
33.1 cm
Average feels-like high
13.4 °C
Average feels-like low
5.0 °C
Average peak gust
40.3 km/h
Tropical nights (≥ 20 °C)
2 d/yr
Solar radiation
13.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.63 · 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
38.9 °C
12 August 2025
Coldest day
-19.1 °C
5 February 1963
Wettest day
86 mm
2 September 1956
Windiest day
47.2 km/h
25 October 2010
Strongest gust
114.5 km/h
8 November 1982
Hottest feels-like
41.0 °C
27 June 2019
Coldest feels-like
-24.4 °C
10 February 1956
Snowiest day
30.4 cm
14 November 2019
Sunniest day
15.0 h
2 June 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 | 8.0 °C | +2.3 °C | 112 mm | +54 mm |
| Feb | 9.6 °C | +2.0 °C | 69 mm | +10 mm |
| Mar | 12.2 °C | +0.8 °C | 108 mm | +40 mm |
| Apr | 17.6 °C | +2.8 °C | 89 mm | +12 mm |
| May | 20.5 °C | +1.7 °C | 70 mm | -24 mm |
| Jun | 29.0 °C | +6.0 °C | 69 mm | -1 mm |
| Jul | 27.4 °C | +1.5 °C | 36 mm | -24 mm |
| Aug | 29.6 °C | +4.1 °C | 48 mm | -22 mm |
| Sep | 21.2 °C | -0.2 °C | 170 mm | +80 mm |
| Oct | 16.3 °C | +0.3 °C | 88 mm | -13 mm |
| Nov | 11.3 °C | +1.3 °C | 100 mm | +10 mm |
| Dec | 8.8 °C | +2.3 °C | 63 mm | -3 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 Portes-lès-Valence?
Portes-lès-Valence has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 11.3 °C and it receives 903 mm of precipitation per year.
What is the hottest day ever recorded in Portes-lès-Valence?
The hottest day measured in Portes-lès-Valence between 1940 and 2025 was 12 August 2025, reaching 38.9 °C.
What is the coldest day in Portes-lès-Valence?
The coldest day measured in Portes-lès-Valence between 1940 and 2025 was 5 February 1963, at -19.1 °C.
Does it snow in Portes-lès-Valence?
Yes. Portes-lès-Valence gets on average 33.1 cm of snow per year and has around 50 frost days.
Has the climate of Portes-lès-Valence warmed?
Yes: Portes-lès-Valence warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Portes-lès-Valence?
The wettest day measured in Portes-lès-Valence between 1940 and 2025 was 2 September 1956, with 86 mm of rain in 24 hours.
What was the windiest day in Portes-lès-Valence?
The windiest day measured in Portes-lès-Valence between 1940 and 2025 was 25 October 2010, with winds reaching 47.2 km/h.
What is the warmest month in Portes-lès-Valence?
The warmest month in Portes-lès-Valence is July (20.6 °C on average); the coldest is January (2.6 °C).
How much does it rain in Portes-lès-Valence?
Portes-lès-Valence receives on average 903 mm of precipitation per year, spread over about 124 rainy days.
Is it sunny in Portes-lès-Valence?
Portes-lès-Valence gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
What is the biggest single-day snowfall in Portes-lès-Valence?
The heaviest 24-hour snowfall measured in Portes-lès-Valence between 1940 and 2025 was 14 November 2019, with 30.4 cm.
Are there tropical nights in Portes-lès-Valence?
Yes: Portes-lès-Valence has on average 2 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Portes-lès-Valence?
In Portes-lès-Valence, between 1940 and 2025, the highest apparent temperature reached 41.0 °C on 27 June 2019, and the lowest was -24.4 °C on 10 February 1956.
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Nearby cities
The climate around Portes-lès-Valence