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Chełm, Poland climate
Cfb Oceanic / temperate
Chełm has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 24°C, while the coldest is January averaging around −5°C at night. Around 612 mm of precipitation falls each year, peaking in July (82 mm) and easing off in February (33 mm). At latitude 51°N, day length swings from 7.7 hours in midwinter to 16.3 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)Chełm climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 0 | 2 | 6 | 14 | 19 | 22 | 24 | 24 | 19 | 12 | 6 | 1 |
| Avg temp (°C) | −3 | −1 | 3 | 9 | 14 | 17 | 19 | 19 | 14 | 8 | 3 | −1 |
| Avg low (°C) | −5 | −4 | −1 | 4 | 8 | 11 | 13 | 13 | 9 | 4 | 1 | −4 |
| Precipitation (mm) | 33 | 33 | 38 | 44 | 71 | 67 | 82 | 55 | 65 | 49 | 38 | 38 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 0 | 2 | 6 | 14 | 19 | 22 |
| Avg temp (°C) | −3 | −1 | 3 | 9 | 14 | 17 |
| Avg low (°C) | −5 | −4 | −1 | 4 | 8 | 11 |
| Precipitation (mm) | 33 | 33 | 38 | 44 | 71 | 67 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 24 | 24 | 19 | 12 | 6 | 1 |
| Avg temp (°C) | 19 | 19 | 14 | 8 | 3 | −1 |
| Avg low (°C) | 13 | 13 | 9 | 4 | 1 | −4 |
| Precipitation (mm) | 82 | 55 | 65 | 49 | 38 | 38 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 76 | 70 | 66 | 65 | 64 | 64 | 59 | 64 | 68 | 77 | 76 |
| Relative humidity (%) | 94 | 91 | 83 | 76 | 74 | 71 | 67 | 65 | 72 | 81 | 91 | 94 |
| Wind speed (mph) | 8.1 | 8.0 | 7.8 | 6.5 | 6.0 | 5.6 | 5.4 | 5.3 | 6.0 | 6.6 | 7.1 | 7.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 76 | 70 | 66 | 65 | 64 |
| Relative humidity (%) | 94 | 91 | 83 | 76 | 74 | 71 |
| Wind speed (mph) | 8.1 | 8.0 | 7.8 | 6.5 | 6.0 | 5.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 59 | 64 | 68 | 77 | 76 |
| Relative humidity (%) | 67 | 65 | 72 | 81 | 91 | 94 |
| Wind speed (mph) | 5.4 | 5.3 | 6.0 | 6.6 | 7.1 | 7.6 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Lublin Radawiec, a weather station, about 75 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.