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Ulsan, South Korea climate
Cfa Humid subtropical
Ulsan has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 86°F, while the coldest is January averaging around 28°F at night. Precipitation totals about 55 inches a year and is strongly seasonal — July alone averages 10.1 inches while December barely receives 1.21 inches.
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)Ulsan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 49 | 56 | 66 | 74 | 79 | 84 | 86 | 79 | 71 | 60 | 49 |
| Avg temp (°F) | 36 | 40 | 47 | 56 | 65 | 71 | 78 | 79 | 71 | 62 | 51 | 40 |
| Avg low (°F) | 28 | 30 | 37 | 46 | 55 | 63 | 71 | 73 | 64 | 53 | 41 | 31 |
| Precipitation (in) | 1.6 | 1.7 | 2.8 | 4.2 | 4.4 | 6.5 | 10.1 | 10.0 | 7.4 | 3.2 | 1.8 | 1.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 49 | 56 | 66 | 74 | 79 |
| Avg temp (°F) | 36 | 40 | 47 | 56 | 65 | 71 |
| Avg low (°F) | 28 | 30 | 37 | 46 | 55 | 63 |
| Precipitation (in) | 1.6 | 1.7 | 2.8 | 4.2 | 4.4 | 6.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 86 | 79 | 71 | 60 | 49 |
| Avg temp (°F) | 78 | 79 | 71 | 62 | 51 | 40 |
| Avg low (°F) | 71 | 73 | 64 | 53 | 41 | 31 |
| Precipitation (in) | 10.1 | 10.0 | 7.4 | 3.2 | 1.8 | 1.2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 53 | 57 | 59 | 59 | 63 | 74 | 74 | 68 | 67 | 55 | 51 | 50 |
| Relative humidity (%) | 76 | 71 | 71 | 73 | 77 | 82 | 87 | 84 | 79 | 73 | 73 | 76 |
| Wind speed (mph) | 12.1 | 11.2 | 10.7 | 9.9 | 8.5 | 7.7 | 8.5 | 8.8 | 9.7 | 9.6 | 10.2 | 11.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 53 | 57 | 59 | 59 | 63 | 74 |
| Relative humidity (%) | 76 | 71 | 71 | 73 | 77 | 82 |
| Wind speed (mph) | 12.1 | 11.2 | 10.7 | 9.9 | 8.5 | 7.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 68 | 67 | 55 | 51 | 50 |
| Relative humidity (%) | 87 | 84 | 79 | 73 | 73 | 76 |
| Wind speed (mph) | 8.5 | 8.8 | 9.7 | 9.6 | 10.2 | 11.6 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Ulsan, a weather station, about 7 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.