Clausthal-Zellerfeld climate — normals and trends
Clausthal-Zellerfeld (Germany) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.0 °C and it receives 824 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 (16.7 °C on average) and the coldest is January (-0.9 °C). Rainfall peaks in July.
Clausthal-Zellerfeld averages 86 frost days, 2 hot days (≥ 30 °C) and 160 rainy days per year.
Clausthal-Zellerfeld 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 102 to 70 per year over the period.
The hottest day of the period reached 36.9 °C (on 20 July 2022) and the coldest -27.8 °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
Clausthal-ZellerfeldLower Saxony
- coords
- 51.81°, 10.34°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.0°C
Average daily high
11.4°C
Average daily low
4.6°C
Annual rainfall
824mm
Sunshine / day
7.2h
Mean relative humidity
81%
Average peak wind
17.0km/h
Seasonal range
17.6°C
Frost days (< 0 °C)
86 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
160 d/yr
Annual snowfall
74.3 cm
Average feels-like high
8.7 °C
Average feels-like low
1.7 °C
Average peak gust
37.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.39 · 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
36.9 °C
20 July 2022
Coldest day
-27.8 °C
27 January 1942
Wettest day
50 mm
4 June 1958
Windiest day
55.1 km/h
13 November 1972
Strongest gust
122.0 km/h
13 November 1972
Hottest feels-like
38.4 °C
14 August 2025
Coldest feels-like
-32.8 °C
27 January 1942
Snowiest day
17.6 cm
22 March 2007
Sunniest day
15.7 h
21 June 2025
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 | 3.5 °C | +2.3 °C | 112 mm | +44 mm |
| Feb | 3.8 °C | +1.4 °C | 25 mm | -35 mm |
| Mar | 11.3 °C | +4.7 °C | 14 mm | -49 mm |
| Apr | 15.5 °C | +4.0 °C | 39 mm | -22 mm |
| May | 18.1 °C | +2.0 °C | 59 mm | -14 mm |
| Jun | 23.1 °C | +3.9 °C | 60 mm | -19 mm |
| Jul | 22.9 °C | +1.9 °C | 87 mm | +7 mm |
| Aug | 23.9 °C | +3.0 °C | 53 mm | -21 mm |
| Sep | 19.2 °C | +2.0 °C | 56 mm | -6 mm |
| Oct | 12.0 °C | 0.0 °C | 86 mm | +26 mm |
| Nov | 7.3 °C | +1.3 °C | 45 mm | -23 mm |
| Dec | 5.4 °C | +2.9 °C | 28 mm | -48 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 Clausthal-Zellerfeld?
Clausthal-Zellerfeld has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.0 °C and it receives 824 mm of precipitation per year.
What is the hottest day ever recorded in Clausthal-Zellerfeld?
The hottest day measured in Clausthal-Zellerfeld between 1940 and 2025 was 20 July 2022, reaching 36.9 °C.
What is the coldest day in Clausthal-Zellerfeld?
The coldest day measured in Clausthal-Zellerfeld between 1940 and 2025 was 27 January 1942, at -27.8 °C.
Does it snow in Clausthal-Zellerfeld?
Yes. Clausthal-Zellerfeld gets on average 74.3 cm of snow per year and has around 86 frost days.
Has the climate of Clausthal-Zellerfeld warmed?
Yes: Clausthal-Zellerfeld warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Clausthal-Zellerfeld?
The wettest day measured in Clausthal-Zellerfeld between 1940 and 2025 was 4 June 1958, with 50 mm of rain in 24 hours.
What was the windiest day in Clausthal-Zellerfeld?
The windiest day measured in Clausthal-Zellerfeld between 1940 and 2025 was 13 November 1972, with winds reaching 55.1 km/h.
What is the warmest month in Clausthal-Zellerfeld?
The warmest month in Clausthal-Zellerfeld is July (16.7 °C on average); the coldest is January (-0.9 °C).
How much does it rain in Clausthal-Zellerfeld?
Clausthal-Zellerfeld receives on average 824 mm of precipitation per year, spread over about 160 rainy days.
Is it sunny in Clausthal-Zellerfeld?
Clausthal-Zellerfeld gets on average 7.2 hours of sunshine per day, roughly 2,628 hours per year over 1940-2025.
What is the biggest single-day snowfall in Clausthal-Zellerfeld?
The heaviest 24-hour snowfall measured in Clausthal-Zellerfeld between 1940 and 2025 was 22 March 2007, with 17.6 cm.
Are there tropical nights in Clausthal-Zellerfeld?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Clausthal-Zellerfeld.
What was the most extreme apparent temperature in Clausthal-Zellerfeld?
In Clausthal-Zellerfeld, between 1940 and 2025, the highest apparent temperature reached 38.4 °C on 14 August 2025, and the lowest was -32.8 °C on 27 January 1942.
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Nearby cities
The climate around Clausthal-Zellerfeld