Kalundborg climate — normals and trends
Kalundborg (Denmark) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.6 °C and it receives 677 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 (17.0 °C on average) and the coldest is February (1.2 °C). Rainfall peaks in August.
Kalundborg averages 39 frost days, 0 hot days (≥ 30 °C) and 135 rainy days per year.
Kalundborg has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 60 to 18 per year over the period.
The hottest day of the period reached 26.3 °C (on 31 July 2018) and the coldest -14.0 °C (on 25 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
KalundborgZealand
- coords
- 55.68°, 11.09°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.6°C
Average daily high
9.8°C
Average daily low
7.5°C
Annual rainfall
677mm
Sunshine / day
8.0h
Mean relative humidity
82%
Average peak wind
32.0km/h
Seasonal range
15.8°C
Frost days (< 0 °C)
39 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
135 d/yr
Annual snowfall
42.2 cm
Average feels-like high
6.1 °C
Average feels-like low
2.5 °C
Average peak gust
43.3 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.56 · 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
26.3 °C
31 July 2018
Coldest day
-14.0 °C
25 January 1942
Wettest day
60 mm
22 July 2025
Windiest day
88.0 km/h
8 January 2005
Strongest gust
133.2 km/h
28 October 2013
Hottest feels-like
27.8 °C
1 August 1994
Coldest feels-like
-24.3 °C
25 January 1942
Snowiest day
16.5 cm
10 April 1970
Sunniest day
16.9 h
28 June 2018
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 | +2.4 °C | 70 mm | +15 mm |
| Feb | 3.1 °C | +0.9 °C | 14 mm | -29 mm |
| Mar | 6.6 °C | +2.8 °C | 15 mm | -27 mm |
| Apr | 10.3 °C | +3.4 °C | 25 mm | -13 mm |
| May | 13.5 °C | +1.6 °C | 46 mm | -1 mm |
| Jun | 17.2 °C | +1.1 °C | 57 mm | +2 mm |
| Jul | 19.7 °C | +1.5 °C | 130 mm | +64 mm |
| Aug | 19.0 °C | +0.7 °C | 39 mm | -31 mm |
| Sep | 17.4 °C | +1.8 °C | 68 mm | +2 mm |
| Oct | 12.7 °C | +1.7 °C | 108 mm | +39 mm |
| Nov | 8.5 °C | +1.5 °C | 60 mm | -7 mm |
| Dec | 6.8 °C | +2.6 °C | 44 mm | -17 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 Kalundborg?
Kalundborg has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 8.6 °C and it receives 677 mm of precipitation per year.
What is the hottest day ever recorded in Kalundborg?
The hottest day measured in Kalundborg between 1940 and 2025 was 31 July 2018, reaching 26.3 °C.
What is the coldest day in Kalundborg?
The coldest day measured in Kalundborg between 1940 and 2025 was 25 January 1942, at -14.0 °C.
Does it snow in Kalundborg?
Yes. Kalundborg gets on average 42.2 cm of snow per year and has around 39 frost days.
Has the climate of Kalundborg warmed?
Yes: Kalundborg warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kalundborg?
The wettest day measured in Kalundborg between 1940 and 2025 was 22 July 2025, with 60 mm of rain in 24 hours.
What was the windiest day in Kalundborg?
The windiest day measured in Kalundborg between 1940 and 2025 was 8 January 2005, with winds reaching 88.0 km/h.
What is the warmest month in Kalundborg?
The warmest month in Kalundborg is August (17.0 °C on average); the coldest is February (1.2 °C).
How much does it rain in Kalundborg?
Kalundborg receives on average 677 mm of precipitation per year, spread over about 135 rainy days.
Is it sunny in Kalundborg?
Kalundborg 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 Kalundborg?
The heaviest 24-hour snowfall measured in Kalundborg between 1940 and 2025 was 10 April 1970, with 16.5 cm.
Are there tropical nights in Kalundborg?
Yes: Kalundborg has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kalundborg?
In Kalundborg, between 1940 and 2025, the highest apparent temperature reached 27.8 °C on 1 August 1994, and the lowest was -24.3 °C on 25 January 1942.
Compare Kalundborg with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kalundborg