Roost-Warendin climate — normals and trends
Roost-Warendin (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.4 °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 (17.8 °C on average) and the coldest is January (3.2 °C). Rainfall peaks in May.
Roost-Warendin averages 43 frost days, 3 hot days (≥ 30 °C) and 134 rainy days per year.
Roost-Warendin has warmed by +1.9 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 59 to 27 per year over the period.
The hottest day of the period reached 41.1 °C (on 25 July 2019) and the coldest -21.5 °C (on 8 January 1985).
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
Roost-WarendinHauts-de-France
- coords
- 50.42°, 3.10°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.4°C
Average daily high
13.9°C
Average daily low
7.0°C
Annual rainfall
672mm
Sunshine / day
7.8h
Mean relative humidity
80%
Average peak wind
19.8km/h
Seasonal range
14.6°C
Frost days (< 0 °C)
43 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
134 d/yr
Annual snowfall
13.6 cm
Average feels-like high
11.4 °C
Average feels-like low
4.2 °C
Average peak gust
38.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.45 · 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
41.1 °C
25 July 2019
Coldest day
-21.5 °C
8 January 1985
Wettest day
50 mm
29 August 1996
Windiest day
59.0 km/h
25 January 1990
Strongest gust
124.6 km/h
18 January 2007
Hottest feels-like
40.2 °C
25 July 2019
Coldest feels-like
-26.3 °C
8 January 1985
Snowiest day
12.9 cm
20 February 1957
Sunniest day
15.9 h
4 July 2025
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 | 5.7 °C | +0.2 °C | 135 mm | +82 mm |
| Feb | 7.2 °C | +0.5 °C | 38 mm | -9 mm |
| Mar | 13.1 °C | +3.0 °C | 11 mm | -41 mm |
| Apr | 17.8 °C | +4.3 °C | 21 mm | -31 mm |
| May | 19.3 °C | +2.1 °C | 29 mm | -35 mm |
| Jun | 23.9 °C | +3.8 °C | 53 mm | -8 mm |
| Jul | 24.4 °C | +2.3 °C | 63 mm | +3 mm |
| Aug | 24.5 °C | +2.5 °C | 23 mm | -35 mm |
| Sep | 20.0 °C | +0.8 °C | 44 mm | -7 mm |
| Oct | 15.2 °C | +0.4 °C | 68 mm | +11 mm |
| Nov | 10.9 °C | +1.4 °C | 55 mm | -5 mm |
| Dec | 8.5 °C | +2.0 °C | 35 mm | -23 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 Roost-Warendin?
Roost-Warendin has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.4 °C and it receives 672 mm of precipitation per year.
What is the hottest day ever recorded in Roost-Warendin?
The hottest day measured in Roost-Warendin between 1940 and 2025 was 25 July 2019, reaching 41.1 °C.
What is the coldest day in Roost-Warendin?
The coldest day measured in Roost-Warendin between 1940 and 2025 was 8 January 1985, at -21.5 °C.
Does it snow in Roost-Warendin?
Yes. Roost-Warendin gets on average 13.6 cm of snow per year and has around 43 frost days.
Has the climate of Roost-Warendin warmed?
Yes: Roost-Warendin warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Roost-Warendin?
The wettest day measured in Roost-Warendin between 1940 and 2025 was 29 August 1996, with 50 mm of rain in 24 hours.
What was the windiest day in Roost-Warendin?
The windiest day measured in Roost-Warendin between 1940 and 2025 was 25 January 1990, with winds reaching 59.0 km/h.
What is the warmest month in Roost-Warendin?
The warmest month in Roost-Warendin is July (17.8 °C on average); the coldest is January (3.2 °C).
How much does it rain in Roost-Warendin?
Roost-Warendin receives on average 672 mm of precipitation per year, spread over about 134 rainy days.
Is it sunny in Roost-Warendin?
Roost-Warendin 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 Roost-Warendin?
The heaviest 24-hour snowfall measured in Roost-Warendin between 1940 and 2025 was 20 February 1957, with 12.9 cm.
Are there tropical nights in Roost-Warendin?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Roost-Warendin.
What was the most extreme apparent temperature in Roost-Warendin?
In Roost-Warendin, between 1940 and 2025, the highest apparent temperature reached 40.2 °C on 25 July 2019, and the lowest was -26.3 °C on 8 January 1985.
Compare Roost-Warendin with another city
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Nearby cities
The climate around Roost-Warendin