Yearly weather and climate in Seoul, South Korea
The yearly weather in Seoul runs from around -7°C in January to 29°C in August. December is the driest month at 3 rainy days; July the wettest at 20. Here is the annual climate data, so you know what you are packing for.
Best time to visit
Weather is fairly consistent year-round. Pack for stable conditions.
Sunshine
Expect up to 9.5 hours of clear skies in May, but only 7.4 hours in Jan. Pack sunglasses and SPF accordingly.
Rainfall
It rains the most in Aug (358mm over 19 days). A reliable rain jacket is a must-have if visiting then.
Day-to-night swings
Temperatures typically drop by 9°C from day to night. Make sure to pack layers for the evenings.
Average temperatures and rainfall
Daily highs and lows in Seoul, averaged over 10 years of recorded weather, with the number of days it typically rains.
- 337°-720°4Jan
- 642°-424°5Feb
- 1254°133°7Mar
- 1864°744°6Apr
- 2272°1253°9May
- 2780°1864°12Jun
- 2984°2272°20Jul
- 2984°2373°19Aug
- 2678°1864°11Sep
- 1965°948°7Oct
- 1253°236°7Nov
- 337°-622°3Dec
Bars span the average daily low to high. Numbers under the drop are rainy days per month (1mm or more) — hover a month for its total rainfall. Dec is typically driest at 3 days (22mm); Jul the wettest at 20 days (324mm).
| Month | Average high | Average low | Rainy days | Total rainfall |
|---|---|---|---|---|
| Jan | 3°C | -7°C | 4 | 28mm |
| Feb | 6°C | -4°C | 5 | 28mm |
| Mar | 12°C | 1°C | 7 | 53mm |
| Apr | 18°C | 7°C | 6 | 58mm |
| May | 22°C | 12°C | 9 | 128mm |
| Jun | 27°C | 18°C | 12 | 177mm |
| Jul | 29°C | 22°C | 20 | 324mm |
| Aug | 29°C | 23°C | 19 | 358mm |
| Sep | 26°C | 18°C | 11 | 199mm |
| Oct | 19°C | 9°C | 7 | 75mm |
| Nov | 12°C | 2°C | 7 | 66mm |
| Dec | 3°C | -6°C | 3 | 22mm |
Weather data by Open-Meteo.com
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