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Karlskrona, Sweden climate
Cfb Oceanic / temperate
Karlskrona has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 23°C, while the coldest is January averaging around −3°C at night. Around 619 mm of precipitation falls each year, peaking in August (75 mm) and easing off in April (28 mm). At latitude 56°N, day length swings from 6.6 hours in midwinter to 17.4 hours at midsummer.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Karlskrona climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 3 | 3 | 6 | 12 | 17 | 20 | 23 | 22 | 17 | 12 | 7 | 4 |
| Avg temp (°C) | 0 | 0 | 2 | 6 | 11 | 14 | 17 | 17 | 13 | 8 | 4 | 1 |
| Avg low (°C) | −3 | −3 | −2 | 0 | 5 | 9 | 11 | 11 | 8 | 4 | 1 | −2 |
| Precipitation (mm) | 45 | 41 | 35 | 28 | 43 | 58 | 67 | 75 | 56 | 59 | 63 | 51 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 3 | 3 | 6 | 12 | 17 | 20 |
| Avg temp (°C) | 0 | 0 | 2 | 6 | 11 | 14 |
| Avg low (°C) | −3 | −3 | −2 | 0 | 5 | 9 |
| Precipitation (mm) | 45 | 41 | 35 | 28 | 43 | 58 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 22 | 17 | 12 | 7 | 4 |
| Avg temp (°C) | 17 | 17 | 13 | 8 | 4 | 1 |
| Avg low (°C) | 11 | 11 | 8 | 4 | 1 | −2 |
| Precipitation (mm) | 67 | 75 | 56 | 59 | 63 | 51 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 74 | 70 | 65 | 65 | 66 | 65 | 66 | 70 | 74 | 76 | 75 |
| Relative humidity (%) | 96 | 94 | 89 | 81 | 78 | 78 | 80 | 83 | 87 | 91 | 96 | 97 |
| Wind speed (mph) | 2.0 | 2.0 | 2.1 | 2.1 | 2.1 | 2.1 | 2.0 | 2.1 | 2.3 | 2.2 | 1.9 | 1.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 74 | 70 | 65 | 65 | 66 |
| Relative humidity (%) | 96 | 94 | 89 | 81 | 78 | 78 |
| Wind speed (mph) | 2.0 | 2.0 | 2.1 | 2.1 | 2.1 | 2.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 66 | 70 | 74 | 76 | 75 |
| Relative humidity (%) | 80 | 83 | 87 | 91 | 96 | 97 |
| Wind speed (mph) | 2.0 | 2.1 | 2.3 | 2.2 | 1.9 | 1.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Ronneby, a weather station, about 23 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.