Strömstad climate — normals and trends
Strömstad (Sweden) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.1 °C and it receives 823 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 (16.9 °C on average) and the coldest is January (-2.0 °C). Rainfall peaks in August.
Strömstad averages 100 frost days, 0 hot days (≥ 30 °C) and 132 rainy days per year.
Strömstad has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The number of frost days there went from about 119 to 81 per year over the period.
The hottest day of the period reached 31.7 °C (on 27 July 2018) and the coldest -25.7 °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
StrömstadVästra Götaland County
- coords
- 58.94°, 11.17°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.1°C
Average daily high
10.0°C
Average daily low
4.1°C
Annual rainfall
823mm
Sunshine / day
8.1h
Mean relative humidity
78%
Average peak wind
19.5km/h
Seasonal range
18.9°C
Frost days (< 0 °C)
100 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
132 d/yr
Annual snowfall
88.1 cm
Average feels-like high
6.9 °C
Average feels-like low
0.7 °C
Average peak gust
40.6 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
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.31 · 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
31.7 °C
27 July 2018
Coldest day
-25.7 °C
10 January 1987
Wettest day
48 mm
19 September 1946
Windiest day
53.9 km/h
15 January 1952
Strongest gust
114.8 km/h
15 January 1952
Hottest feels-like
33.2 °C
13 July 1941
Coldest feels-like
-33.1 °C
10 January 1987
Snowiest day
21.8 cm
6 November 1971
Sunniest day
17.7 h
21 June 2017
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 | 2.6 °C | +2.5 °C | 106 mm | +46 mm |
| Feb | 2.7 °C | +2.2 °C | 39 mm | -7 mm |
| Mar | 7.3 °C | +3.2 °C | 22 mm | -22 mm |
| Apr | 12.7 °C | +3.5 °C | 48 mm | -0 mm |
| May | 15.3 °C | +0.5 °C | 41 mm | -17 mm |
| Jun | 18.4 °C | 0.0 °C | 66 mm | -8 mm |
| Jul | 23.8 °C | +3.5 °C | 78 mm | -5 mm |
| Aug | 19.8 °C | +0.4 °C | 95 mm | +3 mm |
| Sep | 17.3 °C | +1.8 °C | 127 mm | +42 mm |
| Oct | 11.4 °C | +1.1 °C | 116 mm | +29 mm |
| Nov | 6.7 °C | +1.7 °C | 94 mm | +15 mm |
| Dec | 5.2 °C | +3.3 °C | 86 mm | +19 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 Strömstad?
Strömstad has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.1 °C and it receives 823 mm of precipitation per year.
What is the hottest day ever recorded in Strömstad?
The hottest day measured in Strömstad between 1940 and 2025 was 27 July 2018, reaching 31.7 °C.
What is the coldest day in Strömstad?
The coldest day measured in Strömstad between 1940 and 2025 was 10 January 1987, at -25.7 °C.
Does it snow in Strömstad?
Yes. Strömstad gets on average 88.1 cm of snow per year and has around 100 frost days.
Has the climate of Strömstad warmed?
Yes: Strömstad warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Strömstad?
The wettest day measured in Strömstad between 1940 and 2025 was 19 September 1946, with 48 mm of rain in 24 hours.
What was the windiest day in Strömstad?
The windiest day measured in Strömstad between 1940 and 2025 was 15 January 1952, with winds reaching 53.9 km/h.
What is the warmest month in Strömstad?
The warmest month in Strömstad is July (16.9 °C on average); the coldest is January (-2.0 °C).
How much does it rain in Strömstad?
Strömstad receives on average 823 mm of precipitation per year, spread over about 132 rainy days.
Is it sunny in Strömstad?
Strömstad gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Strömstad?
The heaviest 24-hour snowfall measured in Strömstad between 1940 and 2025 was 6 November 1971, with 21.8 cm.
Are there tropical nights in Strömstad?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Strömstad.
What was the most extreme apparent temperature in Strömstad?
In Strömstad, between 1940 and 2025, the highest apparent temperature reached 33.2 °C on 13 July 1941, and the lowest was -33.1 °C on 10 January 1987.
Compare Strömstad with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Strömstad