Karlshamn climate — normals and trends
Karlshamn (Sweden) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.4 °C and it receives 669 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 (16.5 °C on average) and the coldest is February (-0.8 °C). Rainfall peaks in July.
Karlshamn averages 85 frost days, 0 hot days (≥ 30 °C) and 134 rainy days per year.
Karlshamn has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 105 to 65 per year over the period.
The hottest day of the period reached 30.0 °C (on 9 August 1975) and the coldest -23.6 °C (on 27 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
KarlshamnBlekinge County
- coords
- 56.17°, 14.86°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.4°C
Average daily high
9.9°C
Average daily low
4.9°C
Annual rainfall
669mm
Sunshine / day
7.7h
Mean relative humidity
82%
Average peak wind
21.3km/h
Seasonal range
17.3°C
Frost days (< 0 °C)
85 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
134 d/yr
Annual snowfall
67.1 cm
Average feels-like high
6.8 °C
Average feels-like low
1.3 °C
Average peak gust
38.5 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
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.37 · 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
30.0 °C
9 August 1975
Coldest day
-23.6 °C
27 January 1942
Wettest day
47 mm
5 July 2007
Windiest day
61.9 km/h
14 January 1993
Strongest gust
115.6 km/h
18 October 1967
Hottest feels-like
32.2 °C
16 July 2021
Coldest feels-like
-30.0 °C
25 January 1942
Snowiest day
16.7 cm
11 January 1968
Sunniest day
16.6 h
22 June 2019
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 | 3.7 °C | +2.7 °C | 81 mm | +26 mm |
| Feb | 2.6 °C | +1.5 °C | 15 mm | -28 mm |
| Mar | 7.6 °C | +3.7 °C | 13 mm | -26 mm |
| Apr | 11.9 °C | +3.5 °C | 11 mm | -29 mm |
| May | 13.6 °C | +0.2 °C | 52 mm | +2 mm |
| Jun | 17.9 °C | +0.5 °C | 57 mm | -1 mm |
| Jul | 20.9 °C | +1.4 °C | 107 mm | +34 mm |
| Aug | 19.8 °C | +0.7 °C | 39 mm | -29 mm |
| Sep | 17.7 °C | +2.1 °C | 67 mm | +8 mm |
| Oct | 11.8 °C | +1.0 °C | 79 mm | +19 mm |
| Nov | 6.6 °C | +0.8 °C | 47 mm | -15 mm |
| Dec | 5.5 °C | +2.8 °C | 26 mm | -34 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 Karlshamn?
Karlshamn has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.4 °C and it receives 669 mm of precipitation per year.
What is the hottest day ever recorded in Karlshamn?
The hottest day measured in Karlshamn between 1940 and 2025 was 9 August 1975, reaching 30.0 °C.
What is the coldest day in Karlshamn?
The coldest day measured in Karlshamn between 1940 and 2025 was 27 January 1942, at -23.6 °C.
Does it snow in Karlshamn?
Yes. Karlshamn gets on average 67.1 cm of snow per year and has around 85 frost days.
Has the climate of Karlshamn warmed?
Yes: Karlshamn warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Karlshamn?
The wettest day measured in Karlshamn between 1940 and 2025 was 5 July 2007, with 47 mm of rain in 24 hours.
What was the windiest day in Karlshamn?
The windiest day measured in Karlshamn between 1940 and 2025 was 14 January 1993, with winds reaching 61.9 km/h.
What is the warmest month in Karlshamn?
The warmest month in Karlshamn is July (16.5 °C on average); the coldest is February (-0.8 °C).
How much does it rain in Karlshamn?
Karlshamn receives on average 669 mm of precipitation per year, spread over about 134 rainy days.
Is it sunny in Karlshamn?
Karlshamn gets on average 7.7 hours of sunshine per day, roughly 2,811 hours per year over 1940-2025.
What is the biggest single-day snowfall in Karlshamn?
The heaviest 24-hour snowfall measured in Karlshamn between 1940 and 2025 was 11 January 1968, with 16.7 cm.
Are there tropical nights in Karlshamn?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Karlshamn.
What was the most extreme apparent temperature in Karlshamn?
In Karlshamn, between 1940 and 2025, the highest apparent temperature reached 32.2 °C on 16 July 2021, and the lowest was -30.0 °C on 25 January 1942.
Compare Karlshamn with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Karlshamn