Horten climate — normals and trends
Horten (Norway) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.3 °C and it receives 891 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 (-4.4 °C). Rainfall peaks in October.
Horten averages 123 frost days, 1 hot days (≥ 30 °C) and 129 rainy days per year.
Horten has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.
The number of frost days there went from about 147 to 99 per year over the period.
The hottest day of the period reached 33.2 °C (on 27 July 2018) and the coldest -29.8 °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
HortenVestfold
- coords
- 59.42°, 10.48°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.3°C
Average daily high
9.7°C
Average daily low
2.9°C
Annual rainfall
891mm
Sunshine / day
7.9h
Mean relative humidity
78%
Average peak wind
15.0km/h
Seasonal range
21.6°C
Frost days (< 0 °C)
123 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
129 d/yr
Annual snowfall
152.4 cm
Average feels-like high
6.8 °C
Average feels-like low
-0.1 °C
Average peak gust
33.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °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
33.2 °C
27 July 2018
Coldest day
-29.8 °C
10 February 1985
Wettest day
54 mm
19 July 1985
Windiest day
43.6 km/h
5 January 1976
Strongest gust
104.8 km/h
16 October 1987
Hottest feels-like
33.1 °C
3 August 1982
Coldest feels-like
-34.6 °C
10 February 1985
Snowiest day
28.8 cm
6 November 1971
Sunniest day
17.7 h
21 June 2024
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 | 0.7 °C | +2.7 °C | 117 mm | +47 mm |
| Feb | 2.1 °C | +2.9 °C | 36 mm | -17 mm |
| Mar | 8.3 °C | +4.4 °C | 21 mm | -32 mm |
| Apr | 13.9 °C | +4.6 °C | 45 mm | -7 mm |
| May | 17.1 °C | +1.7 °C | 31 mm | -33 mm |
| Jun | 19.5 °C | +0.2 °C | 64 mm | -10 mm |
| Jul | 24.6 °C | +3.4 °C | 108 mm | +21 mm |
| Aug | 20.6 °C | +0.6 °C | 94 mm | +1 mm |
| Sep | 17.0 °C | +1.4 °C | 157 mm | +69 mm |
| Oct | 11.0 °C | +1.1 °C | 158 mm | +65 mm |
| Nov | 6.2 °C | +2.2 °C | 88 mm | -4 mm |
| Dec | 4.3 °C | +4.3 °C | 107 mm | +34 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 Horten?
Horten has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.3 °C and it receives 891 mm of precipitation per year.
What is the hottest day ever recorded in Horten?
The hottest day measured in Horten between 1940 and 2025 was 27 July 2018, reaching 33.2 °C.
What is the coldest day in Horten?
The coldest day measured in Horten between 1940 and 2025 was 10 February 1985, at -29.8 °C.
Does it snow in Horten?
Yes. Horten gets on average 152.4 cm of snow per year and has around 123 frost days.
Has the climate of Horten warmed?
Yes: Horten warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Horten?
The wettest day measured in Horten between 1940 and 2025 was 19 July 1985, with 54 mm of rain in 24 hours.
What was the windiest day in Horten?
The windiest day measured in Horten between 1940 and 2025 was 5 January 1976, with winds reaching 43.6 km/h.
What is the warmest month in Horten?
The warmest month in Horten is July (17.2 °C on average); the coldest is January (-4.4 °C).
How much does it rain in Horten?
Horten receives on average 891 mm of precipitation per year, spread over about 129 rainy days.
Is it sunny in Horten?
Horten gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.
What is the biggest single-day snowfall in Horten?
The heaviest 24-hour snowfall measured in Horten between 1940 and 2025 was 6 November 1971, with 28.8 cm.
Are there tropical nights in Horten?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Horten.
What was the most extreme apparent temperature in Horten?
In Horten, between 1940 and 2025, the highest apparent temperature reached 33.1 °C on 3 August 1982, and the lowest was -34.6 °C on 10 February 1985.
Compare Horten with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Horten