Roanne climate — normals and trends
Roanne (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.4 °C and it receives 929 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 (19.2 °C on average) and the coldest is January (2.0 °C). Rainfall peaks in May.
Roanne averages 61 frost days, 10 hot days (≥ 30 °C) and 151 rainy days per year.
Roanne has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The number of frost days there went from about 75 to 47 per year over the period.
The hottest day of the period reached 38.5 °C (on 12 August 2003) and the coldest -24.1 °C (on 12 January 1945).
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
RoanneRhône-Alpes
- coords
- 46.04°, 4.07°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.4°C
Average daily high
14.6°C
Average daily low
6.5°C
Annual rainfall
929mm
Sunshine / day
8.4h
Mean relative humidity
77%
Average peak wind
13.6km/h
Seasonal range
17.2°C
Frost days (< 0 °C)
61 d/yr
Hot days (≥ 30 °C)
10 d/yr
Rainy days (≥ 1 mm)
151 d/yr
Annual snowfall
41.7 cm
Average feels-like high
12.8 °C
Average feels-like low
4.2 °C
Average peak gust
32.3 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
12.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.51 · 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
38.5 °C
12 August 2003
Coldest day
-24.1 °C
12 January 1945
Wettest day
76 mm
16 September 1958
Windiest day
44.5 km/h
28 December 1999
Strongest gust
108.0 km/h
26 December 1999
Hottest feels-like
40.0 °C
30 July 2024
Coldest feels-like
-28.7 °C
12 January 1945
Snowiest day
25.1 cm
7 January 1994
Sunniest day
15.1 h
20 June 1943
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 | +2.3 °C | 79 mm | +11 mm |
| Feb | 9.4 °C | +2.5 °C | 51 mm | -14 mm |
| Mar | 12.0 °C | +1.3 °C | 78 mm | +11 mm |
| Apr | 16.8 °C | +2.9 °C | 68 mm | -12 mm |
| May | 19.6 °C | +1.7 °C | 75 mm | -22 mm |
| Jun | 27.2 °C | +5.5 °C | 90 mm | +10 mm |
| Jul | 25.4 °C | +1.1 °C | 50 mm | -19 mm |
| Aug | 27.5 °C | +3.6 °C | 81 mm | -3 mm |
| Sep | 20.1 °C | -0.2 °C | 121 mm | +37 mm |
| Oct | 15.1 °C | -0.2 °C | 81 mm | +2 mm |
| Nov | 10.9 °C | +1.7 °C | 113 mm | +30 mm |
| Dec | 8.6 °C | +2.8 °C | 64 mm | -9 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 Roanne?
Roanne has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.4 °C and it receives 929 mm of precipitation per year.
What is the hottest day ever recorded in Roanne?
The hottest day measured in Roanne between 1940 and 2025 was 12 August 2003, reaching 38.5 °C.
What is the coldest day in Roanne?
The coldest day measured in Roanne between 1940 and 2025 was 12 January 1945, at -24.1 °C.
Does it snow in Roanne?
Yes. Roanne gets on average 41.7 cm of snow per year and has around 61 frost days.
Has the climate of Roanne warmed?
Yes: Roanne warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Roanne?
The wettest day measured in Roanne between 1940 and 2025 was 16 September 1958, with 76 mm of rain in 24 hours.
What was the windiest day in Roanne?
The windiest day measured in Roanne between 1940 and 2025 was 28 December 1999, with winds reaching 44.5 km/h.
What is the warmest month in Roanne?
The warmest month in Roanne is July (19.2 °C on average); the coldest is January (2.0 °C).
How much does it rain in Roanne?
Roanne receives on average 929 mm of precipitation per year, spread over about 151 rainy days.
Is it sunny in Roanne?
Roanne gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Roanne?
The heaviest 24-hour snowfall measured in Roanne between 1940 and 2025 was 7 January 1994, with 25.1 cm.
Are there tropical nights in Roanne?
Yes: Roanne has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Roanne?
In Roanne, between 1940 and 2025, the highest apparent temperature reached 40.0 °C on 30 July 2024, and the lowest was -28.7 °C on 12 January 1945.
Compare Roanne with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Roanne