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Słupsk, Poland climate
Cfb Oceanic / temperate
Słupsk has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is August with an average daily high near 71°F, while the coldest is January averaging around 29°F at night. Around 26 inches of precipitation falls each year, peaking in August (3.2 inches) and easing off in April (1.1 inches). At latitude 55°N, day length swings from 7.0 hours in midwinter to 17.0 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)Słupsk climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 37 | 38 | 43 | 52 | 59 | 66 | 71 | 71 | 65 | 55 | 45 | 39 |
| Avg temp (°F) | 33 | 34 | 38 | 45 | 53 | 59 | 64 | 65 | 58 | 50 | 42 | 36 |
| Avg low (°F) | 29 | 30 | 33 | 39 | 46 | 53 | 58 | 58 | 52 | 45 | 38 | 32 |
| Precipitation (in) | 1.7 | 1.5 | 1.5 | 1.1 | 1.8 | 2.0 | 3.0 | 3.2 | 3.2 | 2.8 | 2.3 | 2.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 37 | 38 | 43 | 52 | 59 | 66 |
| Avg temp (°F) | 33 | 34 | 38 | 45 | 53 | 59 |
| Avg low (°F) | 29 | 30 | 33 | 39 | 46 | 53 |
| Precipitation (in) | 1.7 | 1.5 | 1.5 | 1.1 | 1.8 | 2.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 71 | 71 | 65 | 55 | 45 | 39 |
| Avg temp (°F) | 64 | 65 | 58 | 50 | 42 | 36 |
| Avg low (°F) | 58 | 58 | 52 | 45 | 38 | 32 |
| Precipitation (in) | 3.0 | 3.2 | 3.2 | 2.8 | 2.3 | 2.0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 80 | 79 | 75 | 66 | 62 | 64 | 64 | 65 | 66 | 72 | 79 | 79 |
| Relative humidity (%) | 92 | 91 | 87 | 83 | 80 | 78 | 77 | 76 | 79 | 84 | 90 | 92 |
| Wind speed (mph) | 11.8 | 11.2 | 9.9 | 8.3 | 7.5 | 7.9 | 7.9 | 8.0 | 9.1 | 10.1 | 10.5 | 11.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 80 | 79 | 75 | 66 | 62 | 64 |
| Relative humidity (%) | 92 | 91 | 87 | 83 | 80 | 78 |
| Wind speed (mph) | 11.8 | 11.2 | 9.9 | 8.3 | 7.5 | 7.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 65 | 66 | 72 | 79 | 79 |
| Relative humidity (%) | 77 | 76 | 79 | 84 | 90 | 92 |
| Wind speed (mph) | 7.9 | 8.0 | 9.1 | 10.1 | 10.5 | 11.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Ustka, a weather station, about 17 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.