Sarpsborg climate — normals and trends
Sarpsborg (Norway) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.0 °C and it receives 814 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 (-2.6 °C). Rainfall peaks in August.
Sarpsborg averages 107 frost days, 0 hot days (≥ 30 °C) and 128 rainy days per year.
Sarpsborg has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 128 to 86 per year over the period.
The hottest day of the period reached 33.1 °C (on 27 July 2018) and the coldest -27.0 °C (on 10 February 1985).
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
SarpsborgØstfold
- coords
- 59.28°, 11.11°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.0°C
Average daily high
10.1°C
Average daily low
3.9°C
Annual rainfall
814mm
Sunshine / day
8.0h
Mean relative humidity
77%
Average peak wind
18.7km/h
Seasonal range
19.8°C
Frost days (< 0 °C)
107 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
128 d/yr
Annual snowfall
94.2 cm
Average feels-like high
7.1 °C
Average feels-like low
0.5 °C
Average peak gust
38.8 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
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.34 · 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
33.1 °C
27 July 2018
Coldest day
-27.0 °C
10 February 1985
Wettest day
47 mm
19 September 1946
Windiest day
53.0 km/h
15 January 1952
Strongest gust
112.3 km/h
5 January 1976
Hottest feels-like
34.1 °C
26 July 2019
Coldest feels-like
-33.6 °C
10 January 1987
Snowiest day
24.0 cm
6 November 1971
Sunniest day
17.7 h
23 June 2023
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 2.1 °C | +2.4 °C | 104 mm | +44 mm |
| Feb | 2.9 °C | +2.6 °C | 37 mm | -9 mm |
| Mar | 7.9 °C | +3.7 °C | 19 mm | -25 mm |
| Apr | 13.2 °C | +3.7 °C | 47 mm | -2 mm |
| May | 16.3 °C | +1.1 °C | 36 mm | -24 mm |
| Jun | 19.1 °C | +0.1 °C | 65 mm | -7 mm |
| Jul | 24.5 °C | +3.6 °C | 84 mm | +2 mm |
| Aug | 20.3 °C | +0.4 °C | 94 mm | +5 mm |
| Sep | 17.4 °C | +1.7 °C | 139 mm | +56 mm |
| Oct | 11.4 °C | +1.0 °C | 130 mm | +43 mm |
| Nov | 6.8 °C | +1.9 °C | 95 mm | +16 mm |
| Dec | 5.1 °C | +3.6 °C | 88 mm | +23 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 Sarpsborg?
Sarpsborg has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.0 °C and it receives 814 mm of precipitation per year.
What is the hottest day ever recorded in Sarpsborg?
The hottest day measured in Sarpsborg between 1940 and 2025 was 27 July 2018, reaching 33.1 °C.
What is the coldest day in Sarpsborg?
The coldest day measured in Sarpsborg between 1940 and 2025 was 10 February 1985, at -27.0 °C.
Does it snow in Sarpsborg?
Yes. Sarpsborg gets on average 94.2 cm of snow per year and has around 107 frost days.
Has the climate of Sarpsborg warmed?
Yes: Sarpsborg warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sarpsborg?
The wettest day measured in Sarpsborg between 1940 and 2025 was 19 September 1946, with 47 mm of rain in 24 hours.
What was the windiest day in Sarpsborg?
The windiest day measured in Sarpsborg between 1940 and 2025 was 15 January 1952, with winds reaching 53.0 km/h.
What is the warmest month in Sarpsborg?
The warmest month in Sarpsborg is July (17.2 °C on average); the coldest is January (-2.6 °C).
How much does it rain in Sarpsborg?
Sarpsborg receives on average 814 mm of precipitation per year, spread over about 128 rainy days.
Is it sunny in Sarpsborg?
Sarpsborg 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 Sarpsborg?
The heaviest 24-hour snowfall measured in Sarpsborg between 1940 and 2025 was 6 November 1971, with 24.0 cm.
Are there tropical nights in Sarpsborg?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Sarpsborg.
What was the most extreme apparent temperature in Sarpsborg?
In Sarpsborg, between 1940 and 2025, the highest apparent temperature reached 34.1 °C on 26 July 2019, and the lowest was -33.6 °C on 10 January 1987.
Compare Sarpsborg with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sarpsborg