Asker climate — normals and trends
Asker (Norway) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.6 °C and it receives 889 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 (17.0 °C on average) and the coldest is January (-6.0 °C). Rainfall peaks in August.
Asker averages 136 frost days, 1 hot days (≥ 30 °C) and 128 rainy days per year.
Asker 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 161 to 111 per year over the period.
The hottest day of the period reached 33.6 °C (on 10 August 1975) and the coldest -30.2 °C (on 8 January 1982).
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
AskerAkershus
- coords
- 59.83°, 10.44°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.6°C
Average daily high
8.9°C
Average daily low
2.3°C
Annual rainfall
889mm
Sunshine / day
7.8h
Mean relative humidity
79%
Average peak wind
12.8km/h
Seasonal range
23.0°C
Frost days (< 0 °C)
136 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
128 d/yr
Annual snowfall
164.7 cm
Average feels-like high
6.3 °C
Average feels-like low
-0.5 °C
Average peak gust
30.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.43 · 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
33.6 °C
10 August 1975
Coldest day
-30.2 °C
8 January 1982
Wettest day
60 mm
31 July 1989
Windiest day
36.2 km/h
20 February 1943
Strongest gust
100.4 km/h
15 September 1994
Hottest feels-like
33.0 °C
10 August 1975
Coldest feels-like
-35.0 °C
8 January 1982
Snowiest day
28.6 cm
11 March 2021
Sunniest day
18.0 h
20 June 2017
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 | -0.5 °C | +3.0 °C | 104 mm | +38 mm |
| Feb | 0.8 °C | +2.7 °C | 32 mm | -18 mm |
| Mar | 7.8 °C | +4.6 °C | 17 mm | -34 mm |
| Apr | 13.7 °C | +5.3 °C | 38 mm | -14 mm |
| May | 16.8 °C | +2.1 °C | 34 mm | -32 mm |
| Jun | 19.1 °C | +0.3 °C | 75 mm | -2 mm |
| Jul | 24.1 °C | +3.3 °C | 116 mm | +24 mm |
| Aug | 20.2 °C | +0.7 °C | 88 mm | -11 mm |
| Sep | 16.5 °C | +1.4 °C | 159 mm | +74 mm |
| Oct | 10.5 °C | +1.3 °C | 160 mm | +68 mm |
| Nov | 5.6 °C | +2.3 °C | 85 mm | -4 mm |
| Dec | 3.8 °C | +5.0 °C | 101 mm | +31 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 Asker?
Asker has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.6 °C and it receives 889 mm of precipitation per year.
What is the hottest day ever recorded in Asker?
The hottest day measured in Asker between 1940 and 2025 was 10 August 1975, reaching 33.6 °C.
What is the coldest day in Asker?
The coldest day measured in Asker between 1940 and 2025 was 8 January 1982, at -30.2 °C.
Does it snow in Asker?
Yes. Asker gets on average 164.7 cm of snow per year and has around 136 frost days.
Has the climate of Asker warmed?
Yes: Asker warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Asker?
The wettest day measured in Asker between 1940 and 2025 was 31 July 1989, with 60 mm of rain in 24 hours.
What was the windiest day in Asker?
The windiest day measured in Asker between 1940 and 2025 was 20 February 1943, with winds reaching 36.2 km/h.
What is the warmest month in Asker?
The warmest month in Asker is July (17.0 °C on average); the coldest is January (-6.0 °C).
How much does it rain in Asker?
Asker receives on average 889 mm of precipitation per year, spread over about 128 rainy days.
Is it sunny in Asker?
Asker gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Asker?
The heaviest 24-hour snowfall measured in Asker between 1940 and 2025 was 11 March 2021, with 28.6 cm.
Are there tropical nights in Asker?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Asker.
What was the most extreme apparent temperature in Asker?
In Asker, between 1940 and 2025, the highest apparent temperature reached 33.0 °C on 10 August 1975, and the lowest was -35.0 °C on 8 January 1982.
Compare Asker with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Asker