Strängnäs climate — normals and trends
Strängnäs (Sweden) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.3 °C and it receives 576 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 (17.4 °C on average) and the coldest is January (-3.5 °C). Rainfall peaks in August.
Strängnäs averages 133 frost days, 2 hot days (≥ 30 °C) and 117 rainy days per year.
Strängnäs has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 143 to 123 per year over the period.
The hottest day of the period reached 35.5 °C (on 21 July 2022) and the coldest -32.6 °C (on 18 January 1940).
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
SträngnäsSödermanland County
- coords
- 59.38°, 17.03°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.3°C
Average daily high
9.9°C
Average daily low
2.6°C
Annual rainfall
576mm
Sunshine / day
7.4h
Mean relative humidity
78%
Average peak wind
16.8km/h
Seasonal range
20.9°C
Frost days (< 0 °C)
133 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
117 d/yr
Annual snowfall
81.3 cm
Average feels-like high
6.8 °C
Average feels-like low
-0.8 °C
Average peak gust
36.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °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
35.5 °C
21 July 2022
Coldest day
-32.6 °C
18 January 1940
Wettest day
52 mm
29 July 2010
Windiest day
44.8 km/h
2 November 1969
Strongest gust
97.2 km/h
30 December 1983
Hottest feels-like
34.9 °C
7 August 1975
Coldest feels-like
-37.8 °C
18 January 1940
Snowiest day
17.2 cm
28 April 1995
Sunniest day
18.0 h
22 June 1940
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 | 1.2 °C | +2.5 °C | 64 mm | +26 mm |
| Feb | 1.8 °C | +2.5 °C | 11 mm | -18 mm |
| Mar | 8.2 °C | +4.6 °C | 5 mm | -24 mm |
| Apr | 12.7 °C | +3.3 °C | 24 mm | -13 mm |
| May | 14.5 °C | -1.1 °C | 45 mm | +2 mm |
| Jun | 19.8 °C | -0.1 °C | 79 mm | +21 mm |
| Jul | 24.4 °C | +2.6 °C | 106 mm | +35 mm |
| Aug | 19.9 °C | -0.5 °C | 61 mm | -13 mm |
| Sep | 18.4 °C | +2.8 °C | 61 mm | +7 mm |
| Oct | 10.9 °C | +1.2 °C | 58 mm | +9 mm |
| Nov | 5.0 °C | +1.2 °C | 33 mm | -16 mm |
| Dec | 4.6 °C | +4.0 °C | 41 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 Strängnäs?
Strängnäs has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.3 °C and it receives 576 mm of precipitation per year.
What is the hottest day ever recorded in Strängnäs?
The hottest day measured in Strängnäs between 1940 and 2025 was 21 July 2022, reaching 35.5 °C.
What is the coldest day in Strängnäs?
The coldest day measured in Strängnäs between 1940 and 2025 was 18 January 1940, at -32.6 °C.
Does it snow in Strängnäs?
Yes. Strängnäs gets on average 81.3 cm of snow per year and has around 133 frost days.
Has the climate of Strängnäs warmed?
Yes: Strängnäs warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Strängnäs?
The wettest day measured in Strängnäs between 1940 and 2025 was 29 July 2010, with 52 mm of rain in 24 hours.
What was the windiest day in Strängnäs?
The windiest day measured in Strängnäs between 1940 and 2025 was 2 November 1969, with winds reaching 44.8 km/h.
What is the warmest month in Strängnäs?
The warmest month in Strängnäs is July (17.4 °C on average); the coldest is January (-3.5 °C).
How much does it rain in Strängnäs?
Strängnäs receives on average 576 mm of precipitation per year, spread over about 117 rainy days.
Is it sunny in Strängnäs?
Strängnäs gets on average 7.4 hours of sunshine per day, roughly 2,701 hours per year over 1940-2025.
What is the biggest single-day snowfall in Strängnäs?
The heaviest 24-hour snowfall measured in Strängnäs between 1940 and 2025 was 28 April 1995, with 17.2 cm.
Are there tropical nights in Strängnäs?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Strängnäs.
What was the most extreme apparent temperature in Strängnäs?
In Strängnäs, between 1940 and 2025, the highest apparent temperature reached 34.9 °C on 7 August 1975, and the lowest was -37.8 °C on 18 January 1940.
Compare Strängnäs with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Strängnäs