Surahammar climate — normals and trends
Surahammar (Sweden) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.9 °C and it receives 618 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 (-4.1 °C). Rainfall peaks in August.
Surahammar averages 137 frost days, 1 hot days (≥ 30 °C) and 119 rainy days per year.
Surahammar has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 147 to 127 per year over the period.
The hottest day of the period reached 34.8 °C (on 7 August 1975) and the coldest -30.2 °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
SurahammarVästmanland County
- coords
- 59.71°, 16.22°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.9°C
Average daily high
9.5°C
Average daily low
2.3°C
Annual rainfall
618mm
Sunshine / day
7.3h
Mean relative humidity
78%
Average peak wind
16.0km/h
Seasonal range
21.1°C
Frost days (< 0 °C)
137 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
119 d/yr
Annual snowfall
99.1 cm
Average feels-like high
6.5 °C
Average feels-like low
-1.1 °C
Average peak gust
35.7 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
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.24 · 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
34.8 °C
7 August 1975
Coldest day
-30.2 °C
18 January 1940
Wettest day
73 mm
28 August 2022
Windiest day
42.5 km/h
3 January 1954
Strongest gust
99.0 km/h
22 February 2020
Hottest feels-like
35.1 °C
7 August 1975
Coldest feels-like
-35.4 °C
18 January 1940
Snowiest day
16.3 cm
12 December 1999
Sunniest day
18.0 h
22 June 1940
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 | 0.5 °C | +2.3 °C | 70 mm | +29 mm |
| Feb | 1.6 °C | +2.5 °C | 17 mm | -15 mm |
| Mar | 8.2 °C | +4.8 °C | 4 mm | -27 mm |
| Apr | 12.8 °C | +3.5 °C | 34 mm | -7 mm |
| May | 14.4 °C | -1.0 °C | 54 mm | +7 mm |
| Jun | 19.3 °C | -0.2 °C | 100 mm | +37 mm |
| Jul | 23.8 °C | +2.4 °C | 125 mm | +48 mm |
| Aug | 19.5 °C | -0.5 °C | 61 mm | -16 mm |
| Sep | 18.1 °C | +2.8 °C | 68 mm | +11 mm |
| Oct | 10.4 °C | +1.1 °C | 64 mm | +11 mm |
| Nov | 4.6 °C | +1.3 °C | 43 mm | -11 mm |
| Dec | 4.2 °C | +4.2 °C | 45 mm | -1 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 Surahammar?
Surahammar has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.9 °C and it receives 618 mm of precipitation per year.
What is the hottest day ever recorded in Surahammar?
The hottest day measured in Surahammar between 1940 and 2025 was 7 August 1975, reaching 34.8 °C.
What is the coldest day in Surahammar?
The coldest day measured in Surahammar between 1940 and 2025 was 18 January 1940, at -30.2 °C.
Does it snow in Surahammar?
Yes. Surahammar gets on average 99.1 cm of snow per year and has around 137 frost days.
Has the climate of Surahammar warmed?
Yes: Surahammar warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Surahammar?
The wettest day measured in Surahammar between 1940 and 2025 was 28 August 2022, with 73 mm of rain in 24 hours.
What was the windiest day in Surahammar?
The windiest day measured in Surahammar between 1940 and 2025 was 3 January 1954, with winds reaching 42.5 km/h.
What is the warmest month in Surahammar?
The warmest month in Surahammar is July (17.0 °C on average); the coldest is January (-4.1 °C).
How much does it rain in Surahammar?
Surahammar receives on average 618 mm of precipitation per year, spread over about 119 rainy days.
Is it sunny in Surahammar?
Surahammar gets on average 7.3 hours of sunshine per day, roughly 2,665 hours per year over 1940-2025.
What is the biggest single-day snowfall in Surahammar?
The heaviest 24-hour snowfall measured in Surahammar between 1940 and 2025 was 12 December 1999, with 16.3 cm.
Are there tropical nights in Surahammar?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Surahammar.
What was the most extreme apparent temperature in Surahammar?
In Surahammar, between 1940 and 2025, the highest apparent temperature reached 35.1 °C on 7 August 1975, and the lowest was -35.4 °C on 18 January 1940.
Compare Surahammar with another city
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Nearby cities
The climate around Surahammar