Persan climate — normals and trends
Persan (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.5 °C and it receives 672 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 (18.3 °C on average) and the coldest is January (3.2 °C). Rainfall peaks in May.
Persan averages 45 frost days, 4 hot days (≥ 30 °C) and 131 rainy days per year.
Persan 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 59 to 31 per year over the period.
The hottest day of the period reached 40.7 °C (on 25 July 2019) and the coldest -19.0 °C (on 30 December 1950).
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
PersanÎle-de-France Region
- coords
- 49.15°, 2.27°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.5°C
Average daily high
14.3°C
Average daily low
7.0°C
Annual rainfall
672mm
Sunshine / day
7.8h
Mean relative humidity
80%
Average peak wind
18.6km/h
Seasonal range
15.1°C
Frost days (< 0 °C)
45 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
14.1 cm
Average feels-like high
12.0 °C
Average feels-like low
4.3 °C
Average peak gust
36.8 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
11.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.44 · 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
40.7 °C
25 July 2019
Coldest day
-19.0 °C
30 December 1950
Wettest day
42 mm
9 October 2024
Windiest day
55.2 km/h
25 January 1990
Strongest gust
116.6 km/h
25 January 1990
Hottest feels-like
40.2 °C
6 August 2003
Coldest feels-like
-24.2 °C
30 December 1950
Snowiest day
13.4 cm
19 February 1978
Sunniest day
15.9 h
22 June 1941
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 | 6.4 °C | +0.8 °C | 154 mm | +98 mm |
| Feb | 7.4 °C | +0.4 °C | 42 mm | -8 mm |
| Mar | 13.3 °C | +2.8 °C | 22 mm | -31 mm |
| Apr | 18.4 °C | +4.6 °C | 26 mm | -27 mm |
| May | 20.4 °C | +3.0 °C | 26 mm | -37 mm |
| Jun | 25.7 °C | +5.1 °C | 42 mm | -15 mm |
| Jul | 24.6 °C | +1.8 °C | 95 mm | +43 mm |
| Aug | 25.5 °C | +2.8 °C | 34 mm | -20 mm |
| Sep | 19.9 °C | +0.2 °C | 71 mm | +21 mm |
| Oct | 15.7 °C | +0.7 °C | 63 mm | +4 mm |
| Nov | 11.0 °C | +1.5 °C | 53 mm | -9 mm |
| Dec | 8.8 °C | +2.3 °C | 41 mm | -21 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 Persan?
Persan has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.5 °C and it receives 672 mm of precipitation per year.
What is the hottest day ever recorded in Persan?
The hottest day measured in Persan between 1940 and 2025 was 25 July 2019, reaching 40.7 °C.
What is the coldest day in Persan?
The coldest day measured in Persan between 1940 and 2025 was 30 December 1950, at -19.0 °C.
Does it snow in Persan?
Yes. Persan gets on average 14.1 cm of snow per year and has around 45 frost days.
Has the climate of Persan warmed?
Yes: Persan warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Persan?
The wettest day measured in Persan between 1940 and 2025 was 9 October 2024, with 42 mm of rain in 24 hours.
What was the windiest day in Persan?
The windiest day measured in Persan between 1940 and 2025 was 25 January 1990, with winds reaching 55.2 km/h.
What is the warmest month in Persan?
The warmest month in Persan is July (18.3 °C on average); the coldest is January (3.2 °C).
How much does it rain in Persan?
Persan receives on average 672 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Persan?
Persan gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Persan?
The heaviest 24-hour snowfall measured in Persan between 1940 and 2025 was 19 February 1978, with 13.4 cm.
Are there tropical nights in Persan?
Yes: Persan has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Persan?
In Persan, between 1940 and 2025, the highest apparent temperature reached 40.2 °C on 6 August 2003, and the lowest was -24.2 °C on 30 December 1950.
Compare Persan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Persan