Karlskrona weather and climate in 2025
Day
21 °C
Night
13 °C
Sea
17 °C
Precipitation
59 mm
in month
Rainy days
10 days
in month
Daylight
15 hours
average
Sunshine
7 hours
average
Humidity
77 %
Day
21 °C
Night
13 °C
Sea
17 °C
Precipitation
59 mm
in month
Rainy days
10 days
in month
Daylight
15 hours
average
Sunshine
7 hours
average
Humidity
77 %
Overview: Karlskrona
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Weather overview for Karlskrona
Weather overview
Karlskrona, situated in Sweden, experiences a temperate climate characterized by warm summers and cold winters. Throughout the year, temperatures fluctuate from chilly lows of about -2 °C (28 °F) in February to pleasant highs reaching approximately 22 °C (71 °F) in July. Daytime temperatures are significantly moderated due to Karlskrona's coastal positioning, with averages ranging from 2 °C (35 °F) to 21 °C (69 °F) during the summer months. Precipitation varies, with rain being more frequent in the latter half of the year. The city is also known for its relative humidity, which can make colder months feel even nippier, and summer days quite refreshing.
January weather
January sees the year starting with a cool breeze in Karlskrona, with average night temperatures around -2 °C (28 °F). Daytime highs reach a brisk 2 °C (35 °F), often accompanied by 11 days of precipitation that can turn into snow.
February weather
February remains chilly in Karlskrona, with minimal night temps averaging around -2 °C (28 °F). The days are slightly warming up, peaking at 2 °C (36 °F), while moisture hangs in the air with 9 days of wet weather.
March weather
As March arrives in Karlskrona, the warmth starts to creep in, with night lows at -1 °C (30 °F) and day highs reaching 5 °C (41 °F). Expect 9 days of precipitation, with snow starting to give way to rain.
April weather
April shows signs of spring as temperatures climb, with nights averaging 2 °C (36 °F) and days around 10 °C (51 °F). Anticipate fewer wet days, down to 7 days, as Karlskrona's weather starts to moderate.
May weather
May in Karlskrona sees further warming, with nighttime lows at an average of 7 °C (44 °F) and pleasant day highs of 16 °C (60 °F). Be prepared for 8 days of precipitation even as the sun graces us with its presence increasingly.
June weather
June's arrival hints at the onset of summer with Karlskrona's night temps nearing 11 °C (51 °F) and days becoming warmer at 19 °C (66 °F). Expect moist air and 9 days of rainfall as summer unfolds.
July weather
July is Karlskrona's warmest month, boasting nighttime temperatures of about 13 °C (55 °F) and daytime highs cresting at 22 °C (71 °F). July also has 10 days marked with precipitation, typically as brief summer showers.
August weather
August signals the tail-end of summer with the night temperature averaging 13 °C (55 °F) and day peaks at 21 °C (69 °F), set against 10 days of rainfall as late-summer thunderstorms can occur.
September weather
September in Karlskrona introduces autumn with average nightly lows of 9 °C (49 °F) and diminishing day highs around 16 °C (61 °F), coupled with 9 days of rainfall as the season transitions.
October weather
October brings a crisper climate to Karlskrona, as night temperatures hover around 6 °C (42 °F) and days average at 11 °C (52 °F). A high number of wet days at 11 days signifies an often overcast and rainy month.
November weather
November's approach in Karlskrona means a return to colder weather, with average nighttime temperatures at 2 °C (35 °F) and daytime highs reaching just 6 °C (42 °F), plus 12 days of rain on the horizon.
December weather
December in Karlskrona greets the end of the year with frosty nights averaging -1 °C (30 °F) and cool days at 3 °C (37 °F), characterized by 12 days of rain that often turns to snow.
FAQs
How cold can it get in Karlskrona in January?
Karlskrona's January chill can be quite biting, with night temperatures dipping to an average low of -2 °C (28 °F). Dress warmly in layers to keep comfortable.
What should visitors expect for daytime temperatures in Karlskrona in February?
Daytime in Karlskrona during February provides a slight respite from the cold, with temperatures reaching up to 2 °C (36 °F) on average.
Is it still cold in Karlskrona during March?
March holds onto the winter's chill with night temperatures averaging -1 °C (30 °F). By day, the mercury rises to a cool 5 °C (41 °F).
What's the weather in Karlskrona like in April?
April brings a more welcoming climate with day temperatures averaging at 10 °C (51 °F), perfect for exploring Karlskrona's outdoors.
What is the typical temperature during the day in Karlskrona in May?
Daytime in May treats residents and visitors to comfortable highs of about 16 °C (60 °F), marking the approach of summer.
Does Karlskrona get warm in June?
With day temperatures reaching almost 19 °C (66 °F), June is the prelude to warmth, showcasing some of the nicer Swedish summer weather.
What kind of weather does Karlskrona experience in July?
July's weather is the most favorable of the year, with an average high of 22 °C (71 °F) providing ideal conditions for enjoying the outdoors.
Is August considered warm in Karlskrona?
August remains warm with an average daytime high of 21 °C (69 °F), a time when the city is bathed in the last of the summer warmth.
What temperature drops can one expect in Karlskrona by September?
September sees a noticeable drop in temperatures with daytime averaging 16 °C (61 °F) and nights cooling down to 9 °C (49 °F).
Is October a cold month in Karlskrona?
While not freezing, October's air in Karlskrona has a definite chill, particularly in the mornings and evenings, averaging 6 °C (42 °F) at night.
How much does the temperature in Karlskrona decrease in November?
Temperature dips are more pronounced in November, with daytime highs falling to an average of 6 °C (42 °F), signaling the beginning of the cold season.
Are December days in Karlskrona very cold?
December days usually remain above the freezing point, averaging 3 °C (37 °F) during the day, but prepare for colder nights.
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