Walheim - Hahn climate — normals and trends
Walheim - Hahn (Germany) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.2 °C and it receives 876 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 (17.1 °C on average) and the coldest is January (1.3 °C). Rainfall peaks in July.
Walheim - Hahn averages 61 frost days, 2 hot days (≥ 30 °C) and 162 rainy days per year.
Walheim - Hahn has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 77 to 45 per year over the period.
The hottest day of the period reached 39.2 °C (on 25 July 2019) and the coldest -21.5 °C (on 27 January 1942).
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
Walheim - HahnNorth Rhine-Westphalia
- coords
- 50.71°, 6.18°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.2°C
Average daily high
12.4°C
Average daily low
6.1°C
Annual rainfall
876mm
Sunshine / day
7.5h
Mean relative humidity
80%
Average peak wind
19.6km/h
Seasonal range
15.8°C
Frost days (< 0 °C)
61 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
162 d/yr
Annual snowfall
48.2 cm
Average feels-like high
9.8 °C
Average feels-like low
2.9 °C
Average peak gust
40.2 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.43 · 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).
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
39.2 °C
25 July 2019
Coldest day
-21.5 °C
27 January 1942
Wettest day
97 mm
14 July 2021
Windiest day
58.7 km/h
24 November 1984
Strongest gust
137.5 km/h
24 November 1984
Hottest feels-like
39.3 °C
6 July 1957
Coldest feels-like
-26.7 °C
27 January 1942
Snowiest day
18.6 cm
1 February 1953
Sunniest day
15.5 h
1 July 2018
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 | 4.2 °C | +0.8 °C | 141 mm | +73 mm |
| Feb | 5.9 °C | +1.4 °C | 36 mm | -28 mm |
| Mar | 12.3 °C | +3.9 °C | 12 mm | -57 mm |
| Apr | 15.7 °C | +3.5 °C | 79 mm | +13 mm |
| May | 18.5 °C | +2.1 °C | 58 mm | -24 mm |
| Jun | 23.5 °C | +4.2 °C | 59 mm | -25 mm |
| Jul | 23.5 °C | +2.4 °C | 116 mm | +28 mm |
| Aug | 23.7 °C | +2.8 °C | 34 mm | -47 mm |
| Sep | 18.6 °C | +0.9 °C | 106 mm | +40 mm |
| Oct | 12.8 °C | -0.4 °C | 88 mm | +25 mm |
| Nov | 9.6 °C | +2.0 °C | 62 mm | -9 mm |
| Dec | 7.3 °C | +2.8 °C | 35 mm | -40 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 Walheim - Hahn?
Walheim - Hahn has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.2 °C and it receives 876 mm of precipitation per year.
What is the hottest day ever recorded in Walheim - Hahn?
The hottest day measured in Walheim - Hahn between 1940 and 2025 was 25 July 2019, reaching 39.2 °C.
What is the coldest day in Walheim - Hahn?
The coldest day measured in Walheim - Hahn between 1940 and 2025 was 27 January 1942, at -21.5 °C.
Does it snow in Walheim - Hahn?
Yes. Walheim - Hahn gets on average 48.2 cm of snow per year and has around 61 frost days.
Has the climate of Walheim - Hahn warmed?
Yes: Walheim - Hahn warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Walheim - Hahn?
The wettest day measured in Walheim - Hahn between 1940 and 2025 was 14 July 2021, with 97 mm of rain in 24 hours.
What was the windiest day in Walheim - Hahn?
The windiest day measured in Walheim - Hahn between 1940 and 2025 was 24 November 1984, with winds reaching 58.7 km/h.
What is the warmest month in Walheim - Hahn?
The warmest month in Walheim - Hahn is July (17.1 °C on average); the coldest is January (1.3 °C).
How much does it rain in Walheim - Hahn?
Walheim - Hahn receives on average 876 mm of precipitation per year, spread over about 162 rainy days.
Is it sunny in Walheim - Hahn?
Walheim - Hahn 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 Walheim - Hahn?
The heaviest 24-hour snowfall measured in Walheim - Hahn between 1940 and 2025 was 1 February 1953, with 18.6 cm.
Are there tropical nights in Walheim - Hahn?
Yes: Walheim - Hahn has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Walheim - Hahn?
In Walheim - Hahn, between 1940 and 2025, the highest apparent temperature reached 39.3 °C on 6 July 1957, and the lowest was -26.7 °C on 27 January 1942.
Compare Walheim - Hahn with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Walheim - Hahn