Horstmar climate — normals and trends
Horstmar (Germany) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.8 °C and it receives 789 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 (17.9 °C on average) and the coldest is January (1.8 °C). Rainfall peaks in July.
Horstmar averages 56 frost days, 5 hot days (≥ 30 °C) and 151 rainy days per year.
Horstmar has warmed by +2.2 °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 72 to 40 per year over the period.
The hottest day of the period reached 38.8 °C (on 25 July 2019) and the coldest -25.9 °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
HorstmarNorth Rhine-Westphalia
- coords
- 52.08°, 7.31°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.8°C
Average daily high
13.2°C
Average daily low
6.4°C
Annual rainfall
789mm
Sunshine / day
7.4h
Mean relative humidity
79%
Average peak wind
18.0km/h
Seasonal range
16.1°C
Frost days (< 0 °C)
56 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
151 d/yr
Annual snowfall
26.8 cm
Average feels-like high
10.7 °C
Average feels-like low
3.6 °C
Average peak gust
37.8 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.45 · 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
38.8 °C
25 July 2019
Coldest day
-25.9 °C
27 January 1942
Wettest day
94 mm
29 June 1981
Windiest day
54.2 km/h
25 January 1990
Strongest gust
126.4 km/h
25 January 1990
Hottest feels-like
40.7 °C
25 July 2019
Coldest feels-like
-31.0 °C
27 January 1942
Snowiest day
18.6 cm
7 February 2021
Sunniest day
15.7 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 | 4.9 °C | +1.1 °C | 114 mm | +49 mm |
| Feb | 6.3 °C | +1.3 °C | 27 mm | -30 mm |
| Mar | 12.9 °C | +4.1 °C | 13 mm | -48 mm |
| Apr | 17.1 °C | +3.9 °C | 59 mm | +3 mm |
| May | 20.4 °C | +2.8 °C | 39 mm | -25 mm |
| Jun | 23.7 °C | +3.2 °C | 74 mm | +3 mm |
| Jul | 24.2 °C | +2.1 °C | 79 mm | +0 mm |
| Aug | 25.1 °C | +3.1 °C | 39 mm | -34 mm |
| Sep | 19.9 °C | +1.2 °C | 81 mm | +19 mm |
| Oct | 14.0 °C | +0.2 °C | 95 mm | +34 mm |
| Nov | 9.9 °C | +1.7 °C | 51 mm | -16 mm |
| Dec | 7.6 °C | +2.6 °C | 30 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 Horstmar?
Horstmar has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.8 °C and it receives 789 mm of precipitation per year.
What is the hottest day ever recorded in Horstmar?
The hottest day measured in Horstmar between 1940 and 2025 was 25 July 2019, reaching 38.8 °C.
What is the coldest day in Horstmar?
The coldest day measured in Horstmar between 1940 and 2025 was 27 January 1942, at -25.9 °C.
Does it snow in Horstmar?
Yes. Horstmar gets on average 26.8 cm of snow per year and has around 56 frost days.
Has the climate of Horstmar warmed?
Yes: Horstmar warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Horstmar?
The wettest day measured in Horstmar between 1940 and 2025 was 29 June 1981, with 94 mm of rain in 24 hours.
What was the windiest day in Horstmar?
The windiest day measured in Horstmar between 1940 and 2025 was 25 January 1990, with winds reaching 54.2 km/h.
What is the warmest month in Horstmar?
The warmest month in Horstmar is July (17.9 °C on average); the coldest is January (1.8 °C).
How much does it rain in Horstmar?
Horstmar receives on average 789 mm of precipitation per year, spread over about 151 rainy days.
Is it sunny in Horstmar?
Horstmar gets on average 7.4 hours of sunshine per day, roughly 2,701 hours per year over 1940-2025.
What is the biggest single-day snowfall in Horstmar?
The heaviest 24-hour snowfall measured in Horstmar between 1940 and 2025 was 7 February 2021, with 18.6 cm.
Are there tropical nights in Horstmar?
Yes: Horstmar has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Horstmar?
In Horstmar, between 1940 and 2025, the highest apparent temperature reached 40.7 °C on 25 July 2019, and the lowest was -31.0 °C on 27 January 1942.
Compare Horstmar with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Horstmar