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Suwon, South Korea climate
Cwa Monsoon-influenced humid subtropical
Suwon has a strongly seasonal mild-temperate climate (Monsoon-influenced humid subtropical, Köppen Cwa). The hottest month is August with an average daily high near 86°F, while the coldest is January averaging around 21°F at night. Precipitation totals about 59 inches a year and is strongly seasonal — July alone averages 17.3 inches while January barely receives 0.84 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)Suwon climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 36 | 41 | 52 | 64 | 74 | 82 | 84 | 86 | 79 | 68 | 53 | 39 |
| Avg temp (°F) | 28 | 33 | 43 | 55 | 65 | 73 | 78 | 79 | 71 | 59 | 45 | 32 |
| Avg low (°F) | 21 | 25 | 34 | 45 | 56 | 65 | 72 | 73 | 63 | 50 | 37 | 25 |
| Precipitation (in) | 0.8 | 1.3 | 1.6 | 3.0 | 4.1 | 5.4 | 17.3 | 14.3 | 6.1 | 2.3 | 2.2 | 1.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 36 | 41 | 52 | 64 | 74 | 82 |
| Avg temp (°F) | 28 | 33 | 43 | 55 | 65 | 73 |
| Avg low (°F) | 21 | 25 | 34 | 45 | 56 | 65 |
| Precipitation (in) | 0.8 | 1.3 | 1.6 | 3.0 | 4.1 | 5.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 86 | 79 | 68 | 53 | 39 |
| Avg temp (°F) | 78 | 79 | 71 | 59 | 45 | 32 |
| Avg low (°F) | 72 | 73 | 63 | 50 | 37 | 25 |
| Precipitation (in) | 17.3 | 14.3 | 6.1 | 2.3 | 2.2 | 1.0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 51 | 50 | 52 | 55 | 58 | 67 | 75 | 65 | 56 | 46 | 52 | 51 |
| Relative humidity (%) | 76 | 74 | 74 | 74 | 75 | 78 | 85 | 84 | 79 | 75 | 76 | 77 |
| Wind speed (mph) | 7.3 | 7.3 | 7.2 | 6.9 | 6.2 | 5.1 | 6.0 | 5.7 | 5.7 | 6.0 | 6.8 | 7.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 51 | 50 | 52 | 55 | 58 | 67 |
| Relative humidity (%) | 76 | 74 | 74 | 74 | 75 | 78 |
| Wind speed (mph) | 7.3 | 7.3 | 7.2 | 6.9 | 6.2 | 5.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 65 | 56 | 46 | 52 | 51 |
| Relative humidity (%) | 85 | 84 | 79 | 75 | 76 | 77 |
| Wind speed (mph) | 6.0 | 5.7 | 5.7 | 6.0 | 6.8 | 7.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Seoul City, a weather station, about 31 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.