Sandefjord climate — normals and trends
Sandefjord (Norway) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.7 °C and it receives 1,014 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 (-2.8 °C). Rainfall peaks in October.
Sandefjord averages 103 frost days, 0 hot days (≥ 30 °C) and 135 rainy days per year.
Sandefjord 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 128 to 78 per year over the period.
The hottest day of the period reached 30.8 °C (on 11 August 1975) and the coldest -23.5 °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
SandefjordVestfold
- coords
- 59.13°, 10.22°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.7°C
Average daily high
9.2°C
Average daily low
4.2°C
Annual rainfall
1,014mm
Sunshine / day
8.0h
Mean relative humidity
79%
Average peak wind
18.8km/h
Seasonal range
19.5°C
Frost days (< 0 °C)
103 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
135 d/yr
Annual snowfall
153.4 cm
Average feels-like high
6.2 °C
Average feels-like low
0.8 °C
Average peak gust
35.0 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 = 0.40 · 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
30.8 °C
11 August 1975
Coldest day
-23.5 °C
10 January 1987
Wettest day
65 mm
2 September 2015
Windiest day
54.8 km/h
31 January 2008
Strongest gust
104.4 km/h
15 September 1994
Hottest feels-like
31.4 °C
11 August 1975
Coldest feels-like
-31.0 °C
10 January 1987
Snowiest day
31.1 cm
6 November 1971
Sunniest day
17.6 h
23 June 2023
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 | 1.3 °C | +2.2 °C | 123 mm | +43 mm |
| Feb | 1.8 °C | +2.0 °C | 53 mm | -7 mm |
| Mar | 7.0 °C | +3.6 °C | 27 mm | -32 mm |
| Apr | 12.2 °C | +4.0 °C | 53 mm | -2 mm |
| May | 15.4 °C | +1.7 °C | 41 mm | -28 mm |
| Jun | 17.9 °C | +0.3 °C | 60 mm | -16 mm |
| Jul | 23.1 °C | +3.5 °C | 92 mm | +2 mm |
| Aug | 19.6 °C | +0.8 °C | 100 mm | -4 mm |
| Sep | 16.4 °C | +1.4 °C | 194 mm | +88 mm |
| Oct | 11.0 °C | +1.1 °C | 194 mm | +78 mm |
| Nov | 6.8 °C | +2.2 °C | 108 mm | -5 mm |
| Dec | 4.9 °C | +3.8 °C | 140 mm | +54 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 Sandefjord?
Sandefjord has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.7 °C and it receives 1,014 mm of precipitation per year.
What is the hottest day ever recorded in Sandefjord?
The hottest day measured in Sandefjord between 1940 and 2025 was 11 August 1975, reaching 30.8 °C.
What is the coldest day in Sandefjord?
The coldest day measured in Sandefjord between 1940 and 2025 was 10 January 1987, at -23.5 °C.
Does it snow in Sandefjord?
Yes. Sandefjord gets on average 153.4 cm of snow per year and has around 103 frost days.
Has the climate of Sandefjord warmed?
Yes: Sandefjord warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sandefjord?
The wettest day measured in Sandefjord between 1940 and 2025 was 2 September 2015, with 65 mm of rain in 24 hours.
What was the windiest day in Sandefjord?
The windiest day measured in Sandefjord between 1940 and 2025 was 31 January 2008, with winds reaching 54.8 km/h.
What is the warmest month in Sandefjord?
The warmest month in Sandefjord is July (16.7 °C on average); the coldest is January (-2.8 °C).
How much does it rain in Sandefjord?
Sandefjord receives on average 1,014 mm of precipitation per year, spread over about 135 rainy days.
Is it sunny in Sandefjord?
Sandefjord 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 Sandefjord?
The heaviest 24-hour snowfall measured in Sandefjord between 1940 and 2025 was 6 November 1971, with 31.1 cm.
Are there tropical nights in Sandefjord?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Sandefjord.
What was the most extreme apparent temperature in Sandefjord?
In Sandefjord, between 1940 and 2025, the highest apparent temperature reached 31.4 °C on 11 August 1975, and the lowest was -31.0 °C on 10 January 1987.
Compare Sandefjord with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sandefjord