Blendecques climate — normals and trends
Blendecques (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.2 °C and it receives 711 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 (17.3 °C on average) and the coldest is January (3.5 °C). Rainfall peaks in November.
Blendecques averages 37 frost days, 2 hot days (≥ 30 °C) and 137 rainy days per year.
Blendecques has warmed by +2.0 °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 54 to 20 per year over the period.
The hottest day of the period reached 38.2 °C (on 19 July 2022) and the coldest -21.3 °C (on 6 January 1979).
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
BlendecquesHauts-de-France
- coords
- 50.72°, 2.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.2°C
Average daily high
13.4°C
Average daily low
7.2°C
Annual rainfall
711mm
Sunshine / day
8.1h
Mean relative humidity
81%
Average peak wind
20.3km/h
Seasonal range
13.8°C
Frost days (< 0 °C)
37 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
137 d/yr
Annual snowfall
13.8 cm
Average feels-like high
11.0 °C
Average feels-like low
4.3 °C
Average peak gust
40.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.49 · 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
38.2 °C
19 July 2022
Coldest day
-21.3 °C
6 January 1979
Wettest day
49 mm
10 August 1945
Windiest day
66.1 km/h
25 January 1990
Strongest gust
133.6 km/h
25 January 1990
Hottest feels-like
39.7 °C
25 July 2019
Coldest feels-like
-26.0 °C
6 January 1979
Snowiest day
15.5 cm
11 December 2017
Sunniest day
16.0 h
18 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 | 5.8 °C | +0.1 °C | 121 mm | +63 mm |
| Feb | 7.1 °C | +0.6 °C | 42 mm | -8 mm |
| Mar | 12.4 °C | +2.8 °C | 13 mm | -40 mm |
| Apr | 16.7 °C | +4.0 °C | 25 mm | -29 mm |
| May | 17.7 °C | +1.5 °C | 32 mm | -32 mm |
| Jun | 22.3 °C | +3.2 °C | 57 mm | -3 mm |
| Jul | 22.8 °C | +1.7 °C | 74 mm | +14 mm |
| Aug | 22.6 °C | +1.5 °C | 28 mm | -33 mm |
| Sep | 18.8 °C | +0.2 °C | 54 mm | -4 mm |
| Oct | 14.9 °C | +0.4 °C | 68 mm | +6 mm |
| Nov | 11.0 °C | +1.5 °C | 59 mm | -8 mm |
| Dec | 8.5 °C | +1.8 °C | 42 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 Blendecques?
Blendecques has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.2 °C and it receives 711 mm of precipitation per year.
What is the hottest day ever recorded in Blendecques?
The hottest day measured in Blendecques between 1940 and 2025 was 19 July 2022, reaching 38.2 °C.
What is the coldest day in Blendecques?
The coldest day measured in Blendecques between 1940 and 2025 was 6 January 1979, at -21.3 °C.
Does it snow in Blendecques?
Yes. Blendecques gets on average 13.8 cm of snow per year and has around 37 frost days.
Has the climate of Blendecques warmed?
Yes: Blendecques warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Blendecques?
The wettest day measured in Blendecques between 1940 and 2025 was 10 August 1945, with 49 mm of rain in 24 hours.
What was the windiest day in Blendecques?
The windiest day measured in Blendecques between 1940 and 2025 was 25 January 1990, with winds reaching 66.1 km/h.
What is the warmest month in Blendecques?
The warmest month in Blendecques is July (17.3 °C on average); the coldest is January (3.5 °C).
How much does it rain in Blendecques?
Blendecques receives on average 711 mm of precipitation per year, spread over about 137 rainy days.
Is it sunny in Blendecques?
Blendecques gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Blendecques?
The heaviest 24-hour snowfall measured in Blendecques between 1940 and 2025 was 11 December 2017, with 15.5 cm.
Are there tropical nights in Blendecques?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Blendecques.
What was the most extreme apparent temperature in Blendecques?
In Blendecques, between 1940 and 2025, the highest apparent temperature reached 39.7 °C on 25 July 2019, and the lowest was -26.0 °C on 6 January 1979.
Compare Blendecques with another city
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Nearby cities
The climate around Blendecques