Lens climate — normals and trends
Lens has a temperate oceanic climate, averaging 10.2 °C annually with 744 mm of rain per year.
Climate normals · ERA5
LensWallonia
- coords
- 50.56°, 3.90°
- period
- 1940–2025 · 86 yrs
The normals for this period
The average of every indicator across the whole window: temperature, water, sky, wind and notable days.
Mean daily temperature
10.2°C
Average daily high
13.5°C
Average daily low
6.6°C
Annual rainfall
744mm
Sunshine / day
7.6h
Mean relative humidity
80%
Average peak wind
19.7km/h
Seasonal range
15.0°C
Frost days (< 0 °C)
50 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
145 d/yr
Annual snowfall
18.9 cm
Average feels-like high
11.1 °C
Average feels-like low
3.7 °C
Average peak gust
38.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.8 MJ/m²
Has the climate changed?
What the yearly averages say about warming here, and whether the slope is statistically solid.
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.43 · 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).
Climate month by month
How an average year unfolds: when it rains, when it turns hot, when the sun is out.
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
The most extreme days ever measured here, then the year-by-year detail.
Hottest day
39.1 °C
25 July 2019
Coldest day
-19.2 °C
21 February 1956
Wettest day
57 mm
29 August 1996
Windiest day
56.7 km/h
25 January 1990
Strongest gust
124.2 km/h
18 January 2007
Hottest feels-like
40.3 °C
25 July 2019
Coldest feels-like
-24.7 °C
21 February 1956
Snowiest day
10.9 cm
10 December 1990
Sunniest day
15.9 h
24 June 2020
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and compare it with the normal: warmer, drier, more extreme?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 5.1 °C | +0.3 °C | 161 mm | +95 mm |
| Feb | 7.1 °C | +1.0 °C | 51 mm | -7 mm |
| Mar | 13.1 °C | +3.4 °C | 15 mm | -46 mm |
| Apr | 17.4 °C | +4.2 °C | 18 mm | -36 mm |
| May | 19.5 °C | +2.5 °C | 56 mm | -10 mm |
| Jun | 24.0 °C | +4.0 °C | 52 mm | -12 mm |
| Jul | 24.3 °C | +2.5 °C | 69 mm | +3 mm |
| Aug | 24.5 °C | +2.8 °C | 29 mm | -34 mm |
| Sep | 19.9 °C | +1.1 °C | 45 mm | -10 mm |
| Oct | 14.6 °C | +0.3 °C | 74 mm | +14 mm |
| Nov | 10.3 °C | +1.5 °C | 64 mm | -3 mm |
| Dec | 8.3 °C | +2.5 °C | 29 mm | -38 mm |
The year's extremes
What was the weather like that day?
The weather actually measured on a given date, anywhere in the covered window.
Lens (Belgium) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.2 °C and it receives 744 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 (17.7 °C on average) and the coldest is January (2.7 °C). Rainfall peaks in December.
Lens averages 50 frost days, 3 hot days (≥ 30 °C) and 145 rainy days per year.
Lens 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 66 to 34 per year over the period.
The hottest day of the period reached 39.1 °C (on 25 July 2019) and the coldest -19.2 °C (on 21 February 1956).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Frequently asked questions
What is the climate of Lens?
Lens has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.2 °C and it receives 744 mm of precipitation per year.
What is the hottest day ever recorded in Lens?
The hottest day measured in Lens between 1940 and 2025 was 25 July 2019, reaching 39.1 °C.
What is the coldest day in Lens?
The coldest day measured in Lens between 1940 and 2025 was 21 February 1956, at -19.2 °C.
Does it snow in Lens?
Yes. Lens gets on average 18.9 cm of snow per year and has around 50 frost days.
Has the climate of Lens warmed?
Yes: Lens warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Lens?
The wettest day measured in Lens between 1940 and 2025 was 29 August 1996, with 57 mm of rain in 24 hours.
What was the windiest day in Lens?
The windiest day measured in Lens between 1940 and 2025 was 25 January 1990, with winds reaching 56.7 km/h.
What is the warmest month in Lens?
The warmest month in Lens is July (17.7 °C on average); the coldest is January (2.7 °C).
How much does it rain in Lens?
Lens receives on average 744 mm of precipitation per year, spread over about 145 rainy days.
Is it sunny in Lens?
Lens 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 Lens?
The heaviest 24-hour snowfall measured in Lens between 1940 and 2025 was 10 December 1990, with 10.9 cm.
Are there tropical nights in Lens?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Lens.
What was the most extreme apparent temperature in Lens?
In Lens, between 1940 and 2025, the highest apparent temperature reached 40.3 °C on 25 July 2019, and the lowest was -24.7 °C on 21 February 1956.
These forecasts and records come from our own weather API. Developer documentation →
Compare Lens with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Lens