Mamer climate — normals and trends
Mamer (Luxembourg) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.9 °C and it receives 809 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 (17.2 °C on average) and the coldest is January (0.7 °C). Rainfall peaks in December.
Mamer averages 69 frost days, 3 hot days (≥ 30 °C) and 145 rainy days per year.
Mamer 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 84 to 54 per year over the period.
The hottest day of the period reached 37.5 °C (on 25 July 2019) and the coldest -20.3 °C (on 22 January 1940).
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
MamerCapellen
- coords
- 49.63°, 6.02°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.9°C
Average daily high
12.3°C
Average daily low
5.6°C
Annual rainfall
809mm
Sunshine / day
7.5h
Mean relative humidity
81%
Average peak wind
18.2km/h
Seasonal range
16.5°C
Frost days (< 0 °C)
69 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
145 d/yr
Annual snowfall
41.6 cm
Average feels-like high
9.8 °C
Average feels-like low
2.6 °C
Average peak gust
37.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.40 · 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
37.5 °C
25 July 2019
Coldest day
-20.3 °C
22 January 1940
Wettest day
62 mm
14 July 2021
Windiest day
55.0 km/h
28 February 2010
Strongest gust
126.7 km/h
24 November 1984
Hottest feels-like
38.0 °C
25 July 2019
Coldest feels-like
-25.5 °C
22 January 1940
Snowiest day
11.9 cm
29 December 2001
Sunniest day
15.3 h
28 June 1995
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 | 4.6 °C | +1.9 °C | 129 mm | +60 mm |
| Feb | 5.3 °C | +1.0 °C | 45 mm | -16 mm |
| Mar | 12.3 °C | +3.9 °C | 14 mm | -49 mm |
| Apr | 15.9 °C | +3.6 °C | 60 mm | -1 mm |
| May | 18.7 °C | +2.3 °C | 44 mm | -29 mm |
| Jun | 24.0 °C | +4.4 °C | 61 mm | -10 mm |
| Jul | 23.2 °C | +1.6 °C | 101 mm | +34 mm |
| Aug | 24.0 °C | +2.8 °C | 37 mm | -32 mm |
| Sep | 18.0 °C | +0.2 °C | 156 mm | +92 mm |
| Oct | 13.0 °C | +0.2 °C | 90 mm | +26 mm |
| Nov | 8.7 °C | +1.8 °C | 56 mm | -16 mm |
| Dec | 6.6 °C | +2.8 °C | 34 mm | -41 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 Mamer?
Mamer has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 8.9 °C and it receives 809 mm of precipitation per year.
What is the hottest day ever recorded in Mamer?
The hottest day measured in Mamer between 1940 and 2025 was 25 July 2019, reaching 37.5 °C.
What is the coldest day in Mamer?
The coldest day measured in Mamer between 1940 and 2025 was 22 January 1940, at -20.3 °C.
Does it snow in Mamer?
Yes. Mamer gets on average 41.6 cm of snow per year and has around 69 frost days.
Has the climate of Mamer warmed?
Yes: Mamer warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mamer?
The wettest day measured in Mamer between 1940 and 2025 was 14 July 2021, with 62 mm of rain in 24 hours.
What was the windiest day in Mamer?
The windiest day measured in Mamer between 1940 and 2025 was 28 February 2010, with winds reaching 55.0 km/h.
What is the warmest month in Mamer?
The warmest month in Mamer is July (17.2 °C on average); the coldest is January (0.7 °C).
How much does it rain in Mamer?
Mamer receives on average 809 mm of precipitation per year, spread over about 145 rainy days.
Is it sunny in Mamer?
Mamer gets on average 7.5 hours of sunshine per day, roughly 2,738 hours per year over 1940-2025.
What is the biggest single-day snowfall in Mamer?
The heaviest 24-hour snowfall measured in Mamer between 1940 and 2025 was 29 December 2001, with 11.9 cm.
Are there tropical nights in Mamer?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Mamer.
What was the most extreme apparent temperature in Mamer?
In Mamer, between 1940 and 2025, the highest apparent temperature reached 38.0 °C on 25 July 2019, and the lowest was -25.5 °C on 22 January 1940.
Compare Mamer with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Mamer