Heiligenhaus climate — normals and trends
Heiligenhaus (Germany) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.7 °C and it receives 1,006 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 (1.6 °C). Rainfall peaks in December.
Heiligenhaus averages 54 frost days, 4 hot days (≥ 30 °C) and 166 rainy days per year.
Heiligenhaus has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The number of frost days there went from about 71 to 37 per year over the period.
The hottest day of the period reached 38.6 °C (on 25 July 2019) and the coldest -22.6 °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
HeiligenhausNorth Rhine-Westphalia
- coords
- 51.33°, 6.97°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.7°C
Average daily high
13.0°C
Average daily low
6.6°C
Annual rainfall
1,006mm
Sunshine / day
7.5h
Mean relative humidity
79%
Average peak wind
18.3km/h
Seasonal range
16.2°C
Frost days (< 0 °C)
54 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
166 d/yr
Annual snowfall
38.5 cm
Average feels-like high
10.5 °C
Average feels-like low
3.7 °C
Average peak gust
37.8 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.44 · 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
38.6 °C
25 July 2019
Coldest day
-22.6 °C
27 January 1942
Wettest day
93 mm
14 July 2021
Windiest day
55.7 km/h
24 November 1984
Strongest gust
124.9 km/h
18 January 2007
Hottest feels-like
39.9 °C
25 July 2019
Coldest feels-like
-28.2 °C
27 January 1942
Snowiest day
16.9 cm
1 February 1953
Sunniest day
15.5 h
29 June 2019
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 | 5.0 °C | +1.4 °C | 166 mm | +75 mm |
| Feb | 6.5 °C | +1.6 °C | 35 mm | -41 mm |
| Mar | 12.9 °C | +4.0 °C | 15 mm | -64 mm |
| Apr | 16.7 °C | +3.7 °C | 77 mm | +9 mm |
| May | 20.0 °C | +2.7 °C | 57 mm | -22 mm |
| Jun | 24.0 °C | +3.8 °C | 74 mm | -12 mm |
| Jul | 24.4 °C | +2.5 °C | 91 mm | -3 mm |
| Aug | 25.1 °C | +3.4 °C | 44 mm | -44 mm |
| Sep | 19.6 °C | +1.3 °C | 103 mm | +24 mm |
| Oct | 13.4 °C | -0.2 °C | 115 mm | +35 mm |
| Nov | 9.9 °C | +1.9 °C | 83 mm | -8 mm |
| Dec | 7.5 °C | +2.7 °C | 45 mm | -53 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 Heiligenhaus?
Heiligenhaus has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.7 °C and it receives 1,006 mm of precipitation per year.
What is the hottest day ever recorded in Heiligenhaus?
The hottest day measured in Heiligenhaus between 1940 and 2025 was 25 July 2019, reaching 38.6 °C.
What is the coldest day in Heiligenhaus?
The coldest day measured in Heiligenhaus between 1940 and 2025 was 27 January 1942, at -22.6 °C.
Does it snow in Heiligenhaus?
Yes. Heiligenhaus gets on average 38.5 cm of snow per year and has around 54 frost days.
Has the climate of Heiligenhaus warmed?
Yes: Heiligenhaus warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Heiligenhaus?
The wettest day measured in Heiligenhaus between 1940 and 2025 was 14 July 2021, with 93 mm of rain in 24 hours.
What was the windiest day in Heiligenhaus?
The windiest day measured in Heiligenhaus between 1940 and 2025 was 24 November 1984, with winds reaching 55.7 km/h.
What is the warmest month in Heiligenhaus?
The warmest month in Heiligenhaus is July (17.8 °C on average); the coldest is January (1.6 °C).
How much does it rain in Heiligenhaus?
Heiligenhaus receives on average 1,006 mm of precipitation per year, spread over about 166 rainy days.
Is it sunny in Heiligenhaus?
Heiligenhaus 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 Heiligenhaus?
The heaviest 24-hour snowfall measured in Heiligenhaus between 1940 and 2025 was 1 February 1953, with 16.9 cm.
Are there tropical nights in Heiligenhaus?
Yes: Heiligenhaus has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Heiligenhaus?
In Heiligenhaus, between 1940 and 2025, the highest apparent temperature reached 39.9 °C on 25 July 2019, and the lowest was -28.2 °C on 27 January 1942.
Compare Heiligenhaus with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Heiligenhaus