Vänersborg climate — normals and trends
Vänersborg (Sweden) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.8 °C and it receives 766 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 February (-2.4 °C). Rainfall peaks in August.
Vänersborg averages 107 frost days, 0 hot days (≥ 30 °C) and 135 rainy days per year.
Vänersborg has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 123 to 91 per year over the period.
The hottest day of the period reached 32.7 °C (on 9 August 1975) and the coldest -26.6 °C (on 28 January 1942).
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
VänersborgVästra Götaland County
- coords
- 58.38°, 12.32°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.8°C
Average daily high
9.9°C
Average daily low
3.7°C
Annual rainfall
766mm
Sunshine / day
7.8h
Mean relative humidity
81%
Average peak wind
17.6km/h
Seasonal range
19.1°C
Frost days (< 0 °C)
107 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
135 d/yr
Annual snowfall
93.0 cm
Average feels-like high
7.0 °C
Average feels-like low
0.5 °C
Average peak gust
37.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.25 · 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
32.7 °C
9 August 1975
Coldest day
-26.6 °C
28 January 1942
Wettest day
43 mm
16 October 2014
Windiest day
49.2 km/h
8 January 2005
Strongest gust
114.8 km/h
14 January 2007
Hottest feels-like
34.7 °C
6 August 1975
Coldest feels-like
-32.0 °C
28 January 1942
Snowiest day
23.7 cm
4 April 1998
Sunniest day
17.5 h
23 June 2009
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 | 2.7 °C | +2.9 °C | 110 mm | +53 mm |
| Feb | 2.4 °C | +2.3 °C | 29 mm | -15 mm |
| Mar | 7.6 °C | +3.7 °C | 20 mm | -21 mm |
| Apr | 13.2 °C | +4.0 °C | 28 mm | -20 mm |
| May | 14.8 °C | -0.1 °C | 44 mm | -15 mm |
| Jun | 18.7 °C | 0.0 °C | 71 mm | -5 mm |
| Jul | 23.2 °C | +2.8 °C | 73 mm | -12 mm |
| Aug | 19.8 °C | +0.3 °C | 51 mm | -36 mm |
| Sep | 17.4 °C | +2.0 °C | 85 mm | +12 mm |
| Oct | 11.1 °C | +0.9 °C | 80 mm | +10 mm |
| Nov | 5.9 °C | +1.2 °C | 61 mm | -4 mm |
| Dec | 4.9 °C | +3.3 °C | 62 mm | +2 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 Vänersborg?
Vänersborg has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.8 °C and it receives 766 mm of precipitation per year.
What is the hottest day ever recorded in Vänersborg?
The hottest day measured in Vänersborg between 1940 and 2025 was 9 August 1975, reaching 32.7 °C.
What is the coldest day in Vänersborg?
The coldest day measured in Vänersborg between 1940 and 2025 was 28 January 1942, at -26.6 °C.
Does it snow in Vänersborg?
Yes. Vänersborg gets on average 93.0 cm of snow per year and has around 107 frost days.
Has the climate of Vänersborg warmed?
Yes: Vänersborg warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Vänersborg?
The wettest day measured in Vänersborg between 1940 and 2025 was 16 October 2014, with 43 mm of rain in 24 hours.
What was the windiest day in Vänersborg?
The windiest day measured in Vänersborg between 1940 and 2025 was 8 January 2005, with winds reaching 49.2 km/h.
What is the warmest month in Vänersborg?
The warmest month in Vänersborg is July (16.7 °C on average); the coldest is February (-2.4 °C).
How much does it rain in Vänersborg?
Vänersborg receives on average 766 mm of precipitation per year, spread over about 135 rainy days.
Is it sunny in Vänersborg?
Vänersborg 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 Vänersborg?
The heaviest 24-hour snowfall measured in Vänersborg between 1940 and 2025 was 4 April 1998, with 23.7 cm.
Are there tropical nights in Vänersborg?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Vänersborg.
What was the most extreme apparent temperature in Vänersborg?
In Vänersborg, between 1940 and 2025, the highest apparent temperature reached 34.7 °C on 6 August 1975, and the lowest was -32.0 °C on 28 January 1942.
Compare Vänersborg with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Vänersborg