Dielheim climate — normals and trends
Dielheim (Germany) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.3 °C and it receives 774 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 (19.6 °C on average) and the coldest is January (1.0 °C). Rainfall peaks in December.
Dielheim averages 62 frost days, 10 hot days (≥ 30 °C) and 140 rainy days per year.
Dielheim 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 77 to 47 per year over the period.
The hottest day of the period reached 38.7 °C (on 5 July 2015) and the coldest -26.9 °C (on 19 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
DielheimBaden-Wurttemberg
- coords
- 49.28°, 8.74°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.3°C
Average daily high
14.1°C
Average daily low
6.7°C
Annual rainfall
774mm
Sunshine / day
8.0h
Mean relative humidity
75%
Average peak wind
14.6km/h
Seasonal range
18.6°C
Frost days (< 0 °C)
62 d/yr
Hot days (≥ 30 °C)
10 d/yr
Rainy days (≥ 1 mm)
140 d/yr
Annual snowfall
33.6 cm
Average feels-like high
12.1 °C
Average feels-like low
4.3 °C
Average peak gust
32.8 km/h
Tropical nights (≥ 20 °C)
2 d/yr
Solar radiation
11.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.38 · 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
38.7 °C
5 July 2015
Coldest day
-26.9 °C
19 January 1940
Wettest day
65 mm
23 May 1978
Windiest day
54.6 km/h
26 December 1999
Strongest gust
122.0 km/h
18 January 2007
Hottest feels-like
41.6 °C
6 July 1957
Coldest feels-like
-32.7 °C
19 January 1940
Snowiest day
22.9 cm
29 December 2001
Sunniest day
15.1 h
14 June 2021
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 | 6.2 °C | +2.8 °C | 81 mm | +12 mm |
| Feb | 6.5 °C | +1.0 °C | 41 mm | -23 mm |
| Mar | 13.5 °C | +3.4 °C | 15 mm | -49 mm |
| Apr | 17.8 °C | +3.3 °C | 37 mm | -21 mm |
| May | 21.7 °C | +2.9 °C | 44 mm | -26 mm |
| Jun | 27.7 °C | +5.5 °C | 52 mm | -10 mm |
| Jul | 26.4 °C | +2.0 °C | 90 mm | +29 mm |
| Aug | 27.6 °C | +3.6 °C | 55 mm | -5 mm |
| Sep | 20.2 °C | +0.1 °C | 149 mm | +93 mm |
| Oct | 14.6 °C | +0.2 °C | 76 mm | +15 mm |
| Nov | 9.1 °C | +1.2 °C | 46 mm | -25 mm |
| Dec | 6.6 °C | +2.2 °C | 24 mm | -54 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 Dielheim?
Dielheim has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.3 °C and it receives 774 mm of precipitation per year.
What is the hottest day ever recorded in Dielheim?
The hottest day measured in Dielheim between 1940 and 2025 was 5 July 2015, reaching 38.7 °C.
What is the coldest day in Dielheim?
The coldest day measured in Dielheim between 1940 and 2025 was 19 January 1940, at -26.9 °C.
Does it snow in Dielheim?
Yes. Dielheim gets on average 33.6 cm of snow per year and has around 62 frost days.
Has the climate of Dielheim warmed?
Yes: Dielheim warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Dielheim?
The wettest day measured in Dielheim between 1940 and 2025 was 23 May 1978, with 65 mm of rain in 24 hours.
What was the windiest day in Dielheim?
The windiest day measured in Dielheim between 1940 and 2025 was 26 December 1999, with winds reaching 54.6 km/h.
What is the warmest month in Dielheim?
The warmest month in Dielheim is July (19.6 °C on average); the coldest is January (1.0 °C).
How much does it rain in Dielheim?
Dielheim receives on average 774 mm of precipitation per year, spread over about 140 rainy days.
Is it sunny in Dielheim?
Dielheim gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.
What is the biggest single-day snowfall in Dielheim?
The heaviest 24-hour snowfall measured in Dielheim between 1940 and 2025 was 29 December 2001, with 22.9 cm.
Are there tropical nights in Dielheim?
Yes: Dielheim has on average 2 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Dielheim?
In Dielheim, between 1940 and 2025, the highest apparent temperature reached 41.6 °C on 6 July 1957, and the lowest was -32.7 °C on 19 January 1940.
Compare Dielheim with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Dielheim