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South Korea climate by month
8-year averages · when to visit| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seoul | 36° | 41° | 54° | 63° | 72° | 81° | 84° | 84° | 77° | 64° | 54° | 37° |
| Cheonan | 37° | 41° | 55° | 66° | 73° | 82° | 88° | 86° | 79° | 66° | 55° | 39° |
| Hwaseong-si | 36° | 41° | 54° | 64° | 72° | 79° | 86° | 84° | 79° | 66° | 55° | 39° |
| Jeonju | 41° | 45° | 59° | 68° | 75° | 84° | 88° | 88° | 82° | 70° | 59° | 43° |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seoul | 4 | 4 | 7 | 7 | 9 | 11 | 17 | 18 | 11 | 7 | 6 | 4 |
| Cheonan | 5 | 4 | 7 | 7 | 9 | 10 | 17 | 17 | 12 | 9 | 7 | 5 |
| Hwaseong-si | 6 | 4 | 6 | 8 | 9 | 11 | 16 | 18 | 11 | 8 | 6 | 6 |
| Jeonju | 6 | 6 | 8 | 8 | 9 | 13 | 20 | 21 | 12 | 8 | 8 | 7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seoul | 39° | 37° | 42° | 52° | 62° | 74° | 82° | 87° | 82° | 71° | 61° | 47° |
| Hwaseong-si | 38° | 34° | 40° | 50° | 59° | 71° | 82° | 85° | 82° | 71° | 58° | 47° |
Figures are averaged over 8 years of ERA5 reanalysis; sea temps come from ocean reanalysis, and UV is derived from solar elevation.
Seoul climate in September
8-year averages · when to visitBest months: May–September · September: Good
| August | September | October | |
|---|---|---|---|
| Average temperature | ▼ 79°F | 70°F | ▼ 57°F |
| Typical high | ▼ 84°F | 77°F | ▼ 64°F |
| Typical low | ▼ 73°F | 64°F | ▼ 48°F |
| Water temperature | ▼ 87°F | 82°F | ▼ 71°F |
| Precipitation | ▼ 11.9 in | 7.4 in | ▼ 3.7 in |
| Wet days | ▼ 18 d | 11 d | ▼ 7 d |
| Humidity | ▼ 82% | 81% | ▼ 79% |
| Sunshine per day | ▼ 9.1 h | 8.1 h | ▼ 8.0 h |
| Cloud cover | ▲ 33% | 35% | ▼ 29% |
| Midday UV | ▼ 10 | 8 | ▼ 6 |
| Daylight | 13:35 | 12:26 | 11:14 |
| Our take | Good | Good | Acceptable |
September temperatures day by day daily mean + smoothed trend · °F
September precipitation day by day in
September UV day by day clear-sky midday value
Figures are averaged over 8 years of ERA5 reanalysis; sea temps come from ocean reanalysis, and UV is derived from solar elevation.
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Updated: 8:25 PM
South Korea · 13 weather points · Climate reference: Seoul (37.57°N, 126.98°E) · Asia/Seoul