Tønder climate — normals and trends
Tønder (Denmark) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.7 °C and it receives 835 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 August (16.6 °C on average) and the coldest is February (1.4 °C). Rainfall peaks in August.
Tønder averages 50 frost days, 0 hot days (≥ 30 °C) and 153 rainy days per year.
Tønder 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 67 to 33 per year over the period.
The hottest day of the period reached 30.0 °C (on 2 August 2013) and the coldest -17.2 °C (on 13 February 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
TønderSouth Denmark
- coords
- 54.93°, 8.87°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.7°C
Average daily high
10.8°C
Average daily low
6.6°C
Annual rainfall
835mm
Sunshine / day
7.8h
Mean relative humidity
82%
Average peak wind
25.4km/h
Seasonal range
15.2°C
Frost days (< 0 °C)
50 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
153 d/yr
Annual snowfall
32.3 cm
Average feels-like high
7.5 °C
Average feels-like low
2.7 °C
Average peak gust
43.6 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
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.40 · 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
30.0 °C
2 August 2013
Coldest day
-17.2 °C
13 February 1940
Wettest day
48 mm
20 August 1990
Windiest day
81.3 km/h
3 December 1999
Strongest gust
151.6 km/h
3 December 1999
Hottest feels-like
32.7 °C
20 July 2006
Coldest feels-like
-24.5 °C
25 January 1942
Snowiest day
16.2 cm
21 November 1971
Sunniest day
17.0 h
21 June 1940
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 | +2.0 °C | 88 mm | +19 mm |
| Feb | 3.8 °C | +0.8 °C | 22 mm | -31 mm |
| Mar | 8.5 °C | +3.2 °C | 11 mm | -42 mm |
| Apr | 12.0 °C | +2.8 °C | 31 mm | -16 mm |
| May | 15.1 °C | +1.5 °C | 47 mm | -8 mm |
| Jun | 17.9 °C | +1.2 °C | 74 mm | +10 mm |
| Jul | 20.4 °C | +1.7 °C | 133 mm | +53 mm |
| Aug | 19.8 °C | +0.8 °C | 60 mm | -30 mm |
| Sep | 17.6 °C | +1.3 °C | 118 mm | +32 mm |
| Oct | 12.8 °C | +0.6 °C | 130 mm | +44 mm |
| Nov | 8.4 °C | +0.8 °C | 60 mm | -19 mm |
| Dec | 7.0 °C | +2.3 °C | 43 mm | -31 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 Tønder?
Tønder has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 8.7 °C and it receives 835 mm of precipitation per year.
What is the hottest day ever recorded in Tønder?
The hottest day measured in Tønder between 1940 and 2025 was 2 August 2013, reaching 30.0 °C.
What is the coldest day in Tønder?
The coldest day measured in Tønder between 1940 and 2025 was 13 February 1940, at -17.2 °C.
Does it snow in Tønder?
Yes. Tønder gets on average 32.3 cm of snow per year and has around 50 frost days.
Has the climate of Tønder warmed?
Yes: Tønder warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tønder?
The wettest day measured in Tønder between 1940 and 2025 was 20 August 1990, with 48 mm of rain in 24 hours.
What was the windiest day in Tønder?
The windiest day measured in Tønder between 1940 and 2025 was 3 December 1999, with winds reaching 81.3 km/h.
What is the warmest month in Tønder?
The warmest month in Tønder is August (16.6 °C on average); the coldest is February (1.4 °C).
How much does it rain in Tønder?
Tønder receives on average 835 mm of precipitation per year, spread over about 153 rainy days.
Is it sunny in Tønder?
Tønder gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tønder?
The heaviest 24-hour snowfall measured in Tønder between 1940 and 2025 was 21 November 1971, with 16.2 cm.
Are there tropical nights in Tønder?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Tønder.
What was the most extreme apparent temperature in Tønder?
In Tønder, between 1940 and 2025, the highest apparent temperature reached 32.7 °C on 20 July 2006, and the lowest was -24.5 °C on 25 January 1942.
Compare Tønder with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tønder