Hønefoss climate — normals and trends
Hønefoss (Norway) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 3.9 °C and it receives 893 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 (15.5 °C on average) and the coldest is January (-8.1 °C). Rainfall peaks in August.
Hønefoss averages 168 frost days, 0 hot days (≥ 30 °C) and 134 rainy days per year.
Hønefoss has warmed by +3.0 °C between 1940 and 2025, or +0.36 °C per decade. This trend is statistically significant.
The number of frost days there went from about 188 to 148 per year over the period.
The hottest day of the period reached 32.1 °C (on 10 August 1975) and the coldest -31.3 °C (on 11 January 1987).
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
HønefossBuskerud
- coords
- 60.17°, 10.26°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.9°C
Average daily high
7.4°C
Average daily low
0.4°C
Annual rainfall
893mm
Sunshine / day
7.5h
Mean relative humidity
79%
Average peak wind
11.3km/h
Seasonal range
23.6°C
Frost days (< 0 °C)
168 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
134 d/yr
Annual snowfall
200.8 cm
Average feels-like high
4.6 °C
Average feels-like low
-2.6 °C
Average peak gust
30.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.48 · 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
32.1 °C
10 August 1975
Coldest day
-31.3 °C
11 January 1987
Wettest day
54 mm
31 July 1989
Windiest day
33.2 km/h
16 October 1987
Strongest gust
107.6 km/h
16 October 1987
Hottest feels-like
31.2 °C
10 August 1975
Coldest feels-like
-36.8 °C
11 January 1987
Snowiest day
24.6 cm
3 November 2023
Sunniest day
18.2 h
22 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 | -2.8 °C | +2.8 °C | 93 mm | +36 mm |
| Feb | -1.0 °C | +2.3 °C | 35 mm | -8 mm |
| Mar | 6.9 °C | +4.8 °C | 15 mm | -33 mm |
| Apr | 12.7 °C | +5.5 °C | 26 mm | -25 mm |
| May | 15.4 °C | +1.9 °C | 46 mm | -25 mm |
| Jun | 17.8 °C | +0.1 °C | 99 mm | +11 mm |
| Jul | 22.9 °C | +3.3 °C | 160 mm | +54 mm |
| Aug | 18.9 °C | +0.7 °C | 71 mm | -36 mm |
| Sep | 15.1 °C | +1.4 °C | 166 mm | +78 mm |
| Oct | 9.0 °C | +1.5 °C | 140 mm | +52 mm |
| Nov | 3.7 °C | +2.5 °C | 73 mm | -9 mm |
| Dec | 1.9 °C | +5.4 °C | 89 mm | +26 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 Hønefoss?
Hønefoss has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 3.9 °C and it receives 893 mm of precipitation per year.
What is the hottest day ever recorded in Hønefoss?
The hottest day measured in Hønefoss between 1940 and 2025 was 10 August 1975, reaching 32.1 °C.
What is the coldest day in Hønefoss?
The coldest day measured in Hønefoss between 1940 and 2025 was 11 January 1987, at -31.3 °C.
Does it snow in Hønefoss?
Yes. Hønefoss gets on average 200.8 cm of snow per year and has around 168 frost days.
Has the climate of Hønefoss warmed?
Yes: Hønefoss warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hønefoss?
The wettest day measured in Hønefoss between 1940 and 2025 was 31 July 1989, with 54 mm of rain in 24 hours.
What was the windiest day in Hønefoss?
The windiest day measured in Hønefoss between 1940 and 2025 was 16 October 1987, with winds reaching 33.2 km/h.
What is the warmest month in Hønefoss?
The warmest month in Hønefoss is July (15.5 °C on average); the coldest is January (-8.1 °C).
How much does it rain in Hønefoss?
Hønefoss receives on average 893 mm of precipitation per year, spread over about 134 rainy days.
Is it sunny in Hønefoss?
Hønefoss gets on average 7.5 hours of sunshine per day, roughly 2,738 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hønefoss?
The heaviest 24-hour snowfall measured in Hønefoss between 1940 and 2025 was 3 November 2023, with 24.6 cm.
Are there tropical nights in Hønefoss?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Hønefoss.
What was the most extreme apparent temperature in Hønefoss?
In Hønefoss, between 1940 and 2025, the highest apparent temperature reached 31.2 °C on 10 August 1975, and the lowest was -36.8 °C on 11 January 1987.
Compare Hønefoss with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hønefoss