Tønsberg climate — normals and trends
Tønsberg (Norway) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.2 °C and it receives 975 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 (17.2 °C on average) and the coldest is January (-2.1 °C). Rainfall peaks in October.
Tønsberg averages 89 frost days, 0 hot days (≥ 30 °C) and 131 rainy days per year.
Tønsberg has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 114 to 64 per year over the period.
The hottest day of the period reached 31.1 °C (on 28 June 2009) and the coldest -22.9 °C (on 10 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
TønsbergVestfold
- coords
- 59.27°, 10.41°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.2°C
Average daily high
9.4°C
Average daily low
5.1°C
Annual rainfall
975mm
Sunshine / day
8.1h
Mean relative humidity
79%
Average peak wind
21.2km/h
Seasonal range
19.3°C
Frost days (< 0 °C)
89 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
117.7 cm
Average feels-like high
6.3 °C
Average feels-like low
1.6 °C
Average peak gust
33.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °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
31.1 °C
28 June 2009
Coldest day
-22.9 °C
10 January 1987
Wettest day
56 mm
2 September 2015
Windiest day
61.2 km/h
5 January 1976
Strongest gust
105.1 km/h
5 January 1976
Hottest feels-like
31.6 °C
26 July 2019
Coldest feels-like
-30.8 °C
10 January 1987
Snowiest day
27.8 cm
6 November 1971
Sunniest day
17.5 h
19 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 | 2.1 °C | +2.5 °C | 118 mm | +42 mm |
| Feb | 2.1 °C | +2.0 °C | 60 mm | +3 mm |
| Mar | 6.8 °C | +3.4 °C | 24 mm | -31 mm |
| Apr | 11.8 °C | +3.7 °C | 54 mm | +1 mm |
| May | 15.2 °C | +1.6 °C | 39 mm | -25 mm |
| Jun | 17.8 °C | +0.2 °C | 60 mm | -12 mm |
| Jul | 23.0 °C | +3.4 °C | 79 mm | -4 mm |
| Aug | 19.6 °C | +0.7 °C | 99 mm | +2 mm |
| Sep | 16.6 °C | +1.4 °C | 194 mm | +89 mm |
| Oct | 11.1 °C | +0.9 °C | 192 mm | +74 mm |
| Nov | 7.3 °C | +2.2 °C | 115 mm | +4 mm |
| Dec | 5.4 °C | +3.7 °C | 144 mm | +60 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 Tønsberg?
Tønsberg has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.2 °C and it receives 975 mm of precipitation per year.
What is the hottest day ever recorded in Tønsberg?
The hottest day measured in Tønsberg between 1940 and 2025 was 28 June 2009, reaching 31.1 °C.
What is the coldest day in Tønsberg?
The coldest day measured in Tønsberg between 1940 and 2025 was 10 January 1987, at -22.9 °C.
Does it snow in Tønsberg?
Yes. Tønsberg gets on average 117.7 cm of snow per year and has around 89 frost days.
Has the climate of Tønsberg warmed?
Yes: Tønsberg warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tønsberg?
The wettest day measured in Tønsberg between 1940 and 2025 was 2 September 2015, with 56 mm of rain in 24 hours.
What was the windiest day in Tønsberg?
The windiest day measured in Tønsberg between 1940 and 2025 was 5 January 1976, with winds reaching 61.2 km/h.
What is the warmest month in Tønsberg?
The warmest month in Tønsberg is July (17.2 °C on average); the coldest is January (-2.1 °C).
How much does it rain in Tønsberg?
Tønsberg receives on average 975 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Tønsberg?
Tønsberg gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tønsberg?
The heaviest 24-hour snowfall measured in Tønsberg between 1940 and 2025 was 6 November 1971, with 27.8 cm.
Are there tropical nights in Tønsberg?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Tønsberg.
What was the most extreme apparent temperature in Tønsberg?
In Tønsberg, between 1940 and 2025, the highest apparent temperature reached 31.6 °C on 26 July 2019, and the lowest was -30.8 °C on 10 January 1987.
Compare Tønsberg with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tønsberg