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Ostrołęka, Poland climate
Cfb Oceanic / temperate
Ostrołęka has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 77°F, while the coldest is January averaging around 23°F at night. Around 22 inches of precipitation falls each year, peaking in June (3.0 inches) and easing off in February (1.1 inches). At latitude 53°N, day length swings from 7.3 hours in midwinter to 16.7 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)Ostrołęka climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 33 | 36 | 45 | 58 | 68 | 74 | 77 | 77 | 67 | 55 | 43 | 36 |
| Avg temp (°F) | 28 | 30 | 37 | 47 | 56 | 63 | 66 | 65 | 57 | 47 | 38 | 31 |
| Avg low (°F) | 23 | 24 | 29 | 36 | 45 | 51 | 55 | 54 | 47 | 39 | 33 | 27 |
| Precipitation (in) | 1.1 | 1.1 | 1.3 | 1.5 | 2.2 | 3.0 | 2.8 | 2.5 | 2.5 | 1.7 | 1.3 | 1.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 33 | 36 | 45 | 58 | 68 | 74 |
| Avg temp (°F) | 28 | 30 | 37 | 47 | 56 | 63 |
| Avg low (°F) | 23 | 24 | 29 | 36 | 45 | 51 |
| Precipitation (in) | 1.1 | 1.1 | 1.3 | 1.5 | 2.2 | 3.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 77 | 77 | 67 | 55 | 43 | 36 |
| Avg temp (°F) | 66 | 65 | 57 | 47 | 38 | 31 |
| Avg low (°F) | 55 | 54 | 47 | 39 | 33 | 27 |
| Precipitation (in) | 2.8 | 2.5 | 2.5 | 1.7 | 1.3 | 1.4 |
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 (%) | 94 | 92 | 84 | 75 | 73 | 71 | 71 | 69 | 74 | 83 | 91 | 94 |
| Wind speed (mph) | 7.7 | 7.7 | 7.3 | 6.2 | 5.8 | 5.5 | 5.3 | 5.1 | 5.7 | 6.4 | 6.8 | 7.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 76 | 70 | 65 | 65 | 65 |
| Relative humidity (%) | 94 | 92 | 84 | 75 | 73 | 71 |
| Wind speed (mph) | 7.7 | 7.7 | 7.3 | 6.2 | 5.8 | 5.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 62 | 65 | 71 | 79 | 74 |
| Relative humidity (%) | 71 | 69 | 74 | 83 | 91 | 94 |
| Wind speed (mph) | 5.3 | 5.1 | 5.7 | 6.4 | 6.8 | 7.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 28 years of daily observations at Ostroleka, a weather station, inside the city. 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.