Firminy climate — normals and trends
Firminy (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.8 °C and it receives 833 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 (18.7 °C on average) and the coldest is January (1.4 °C). Rainfall peaks in May.
Firminy averages 72 frost days, 7 hot days (≥ 30 °C) and 140 rainy days per year.
Firminy has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 89 to 55 per year over the period.
The hottest day of the period reached 37.8 °C (on 31 July 2020) and the coldest -23.7 °C (on 15 February 1956).
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
FirminyRhône-Alpes
- coords
- 45.39°, 4.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.8°C
Average daily high
14.1°C
Average daily low
5.8°C
Annual rainfall
833mm
Sunshine / day
8.8h
Mean relative humidity
76%
Average peak wind
14.4km/h
Seasonal range
17.3°C
Frost days (< 0 °C)
72 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
140 d/yr
Annual snowfall
56.6 cm
Average feels-like high
12.0 °C
Average feels-like low
3.4 °C
Average peak gust
35.5 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
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.58 · 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
37.8 °C
31 July 2020
Coldest day
-23.7 °C
15 February 1956
Wettest day
82 mm
8 September 1994
Windiest day
46.4 km/h
7 November 1982
Strongest gust
119.2 km/h
8 November 1982
Hottest feels-like
39.3 °C
31 July 2020
Coldest feels-like
-29.0 °C
15 February 1956
Snowiest day
31.4 cm
27 November 1982
Sunniest day
15.0 h
3 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 | 7.3 °C | +2.7 °C | 62 mm | +6 mm |
| Feb | 8.8 °C | +2.4 °C | 54 mm | -1 mm |
| Mar | 10.8 °C | +0.7 °C | 95 mm | +36 mm |
| Apr | 16.0 °C | +2.7 °C | 76 mm | 0 mm |
| May | 18.8 °C | +1.5 °C | 75 mm | -17 mm |
| Jun | 27.2 °C | +5.9 °C | 58 mm | -16 mm |
| Jul | 25.3 °C | +1.4 °C | 41 mm | -19 mm |
| Aug | 27.5 °C | +3.8 °C | 58 mm | -13 mm |
| Sep | 19.6 °C | -0.4 °C | 123 mm | +48 mm |
| Oct | 15.0 °C | +0.1 °C | 54 mm | -24 mm |
| Nov | 10.1 °C | +1.3 °C | 93 mm | +18 mm |
| Dec | 8.2 °C | +2.8 °C | 63 mm | +1 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 Firminy?
Firminy has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.8 °C and it receives 833 mm of precipitation per year.
What is the hottest day ever recorded in Firminy?
The hottest day measured in Firminy between 1940 and 2025 was 31 July 2020, reaching 37.8 °C.
What is the coldest day in Firminy?
The coldest day measured in Firminy between 1940 and 2025 was 15 February 1956, at -23.7 °C.
Does it snow in Firminy?
Yes. Firminy gets on average 56.6 cm of snow per year and has around 72 frost days.
Has the climate of Firminy warmed?
Yes: Firminy warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Firminy?
The wettest day measured in Firminy between 1940 and 2025 was 8 September 1994, with 82 mm of rain in 24 hours.
What was the windiest day in Firminy?
The windiest day measured in Firminy between 1940 and 2025 was 7 November 1982, with winds reaching 46.4 km/h.
What is the warmest month in Firminy?
The warmest month in Firminy is July (18.7 °C on average); the coldest is January (1.4 °C).
How much does it rain in Firminy?
Firminy receives on average 833 mm of precipitation per year, spread over about 140 rainy days.
Is it sunny in Firminy?
Firminy 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 Firminy?
The heaviest 24-hour snowfall measured in Firminy between 1940 and 2025 was 27 November 1982, with 31.4 cm.
Are there tropical nights in Firminy?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Firminy.
What was the most extreme apparent temperature in Firminy?
In Firminy, between 1940 and 2025, the highest apparent temperature reached 39.3 °C on 31 July 2020, and the lowest was -29.0 °C on 15 February 1956.
Compare Firminy with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Firminy