Jarny climate — normals and trends
Jarny (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.8 °C and it receives 792 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 (18.4 °C on average) and the coldest is January (1.4 °C). Rainfall peaks in December.
Jarny averages 60 frost days, 5 hot days (≥ 30 °C) and 142 rainy days per year.
Jarny has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 73 to 47 per year over the period.
The hottest day of the period reached 38.8 °C (on 25 July 2019) and the coldest -19.2 °C (on 13 January 1968).
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
JarnyGrand Est
- coords
- 49.16°, 5.88°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.8°C
Average daily high
13.4°C
Average daily low
6.4°C
Annual rainfall
792mm
Sunshine / day
7.6h
Mean relative humidity
79%
Average peak wind
17.8km/h
Seasonal range
17.0°C
Frost days (< 0 °C)
60 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
142 d/yr
Annual snowfall
28.2 cm
Average feels-like high
11.1 °C
Average feels-like low
3.6 °C
Average peak gust
35.9 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
11.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.39 · 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
38.8 °C
25 July 2019
Coldest day
-19.2 °C
13 January 1968
Wettest day
55 mm
14 July 2021
Windiest day
61.0 km/h
26 December 1999
Strongest gust
128.2 km/h
26 December 1999
Hottest feels-like
39.0 °C
24 July 2019
Coldest feels-like
-24.4 °C
2 February 1956
Snowiest day
12.0 cm
7 January 1968
Sunniest day
15.3 h
29 June 2019
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 | 5.6 °C | +2.0 °C | 111 mm | +45 mm |
| Feb | 6.3 °C | +1.0 °C | 42 mm | -18 mm |
| Mar | 13.3 °C | +3.8 °C | 18 mm | -44 mm |
| Apr | 17.0 °C | +3.6 °C | 63 mm | +3 mm |
| May | 19.9 °C | +2.4 °C | 29 mm | -43 mm |
| Jun | 25.5 °C | +4.7 °C | 50 mm | -17 mm |
| Jul | 24.2 °C | +1.3 °C | 90 mm | +28 mm |
| Aug | 25.6 °C | +3.0 °C | 44 mm | -21 mm |
| Sep | 19.2 °C | +0.1 °C | 165 mm | +101 mm |
| Oct | 14.3 °C | +0.4 °C | 90 mm | +25 mm |
| Nov | 9.7 °C | +1.9 °C | 62 mm | -10 mm |
| Dec | 7.5 °C | +2.9 °C | 37 mm | -39 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 Jarny?
Jarny has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.8 °C and it receives 792 mm of precipitation per year.
What is the hottest day ever recorded in Jarny?
The hottest day measured in Jarny between 1940 and 2025 was 25 July 2019, reaching 38.8 °C.
What is the coldest day in Jarny?
The coldest day measured in Jarny between 1940 and 2025 was 13 January 1968, at -19.2 °C.
Does it snow in Jarny?
Yes. Jarny gets on average 28.2 cm of snow per year and has around 60 frost days.
Has the climate of Jarny warmed?
Yes: Jarny warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jarny?
The wettest day measured in Jarny between 1940 and 2025 was 14 July 2021, with 55 mm of rain in 24 hours.
What was the windiest day in Jarny?
The windiest day measured in Jarny between 1940 and 2025 was 26 December 1999, with winds reaching 61.0 km/h.
What is the warmest month in Jarny?
The warmest month in Jarny is July (18.4 °C on average); the coldest is January (1.4 °C).
How much does it rain in Jarny?
Jarny receives on average 792 mm of precipitation per year, spread over about 142 rainy days.
Is it sunny in Jarny?
Jarny gets on average 7.6 hours of sunshine per day, roughly 2,774 hours per year over 1940-2025.
What is the biggest single-day snowfall in Jarny?
The heaviest 24-hour snowfall measured in Jarny between 1940 and 2025 was 7 January 1968, with 12.0 cm.
Are there tropical nights in Jarny?
Yes: Jarny has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Jarny?
In Jarny, between 1940 and 2025, the highest apparent temperature reached 39.0 °C on 24 July 2019, and the lowest was -24.4 °C on 2 February 1956.
Compare Jarny with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Jarny