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Olsztyn, Poland climate
Cfb Oceanic / temperate
Olsztyn has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 75°F, while the coldest is January averaging around 24°F at night. Around 26 inches of precipitation falls each year, peaking in July (3.4 inches) and easing off in February (1.3 inches). At latitude 54°N, day length swings from 7.2 hours in midwinter to 16.8 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)Olsztyn climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 33 | 35 | 43 | 56 | 65 | 71 | 75 | 74 | 64 | 53 | 42 | 35 |
| Avg temp (°F) | 28 | 30 | 36 | 46 | 55 | 61 | 65 | 64 | 56 | 47 | 38 | 31 |
| Avg low (°F) | 24 | 25 | 29 | 36 | 44 | 51 | 55 | 54 | 47 | 40 | 34 | 27 |
| Precipitation (in) | 2.2 | 1.3 | 1.5 | 1.5 | 2.4 | 2.8 | 3.4 | 2.7 | 2.2 | 2.3 | 1.9 | 1.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 33 | 35 | 43 | 56 | 65 | 71 |
| Avg temp (°F) | 28 | 30 | 36 | 46 | 55 | 61 |
| Avg low (°F) | 24 | 25 | 29 | 36 | 44 | 51 |
| Precipitation (in) | 2.2 | 1.3 | 1.5 | 1.5 | 2.4 | 2.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 75 | 74 | 64 | 53 | 42 | 35 |
| Avg temp (°F) | 65 | 64 | 56 | 47 | 38 | 31 |
| Avg low (°F) | 55 | 54 | 47 | 40 | 34 | 27 |
| Precipitation (in) | 3.4 | 2.7 | 2.2 | 2.3 | 1.9 | 1.8 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 76 | 70 | 65 | 65 | 65 | 66 | 62 | 65 | 71 | 79 | 74 |
| Relative humidity (%) | 95 | 93 | 87 | 79 | 77 | 77 | 76 | 75 | 78 | 85 | 93 | 95 |
| Wind speed (mph) | 8.6 | 8.5 | 7.8 | 6.6 | 6.1 | 5.9 | 5.7 | 5.5 | 6.2 | 7.1 | 7.5 | 8.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 76 | 70 | 65 | 65 | 65 |
| Relative humidity (%) | 95 | 93 | 87 | 79 | 77 | 77 |
| Wind speed (mph) | 8.6 | 8.5 | 7.8 | 6.6 | 6.1 | 5.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 62 | 65 | 71 | 79 | 74 |
| Relative humidity (%) | 76 | 75 | 78 | 85 | 93 | 95 |
| Wind speed (mph) | 5.7 | 5.5 | 6.2 | 7.1 | 7.5 | 8.0 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Olsztyn, a weather station, about 5 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.