Experience the unique four-season charm of Seoul, South Korea. Spring (March-May) offers a blossoming spectacle with temperatures averaging 10°C (50°F), perfect for cherry blossom festivals. Summers (June-August) can be hot and humid, reaching highs of 30°C (86°F). Autumn (September-November) boasts crisp leaves and mild temperatures around 15°C (59°F). Winters (December-February), while chilly with lows near -5°C (23°F), offer a magical snowy landscape. A must-do in any season is hiking up Bukhansan Mountain for breathtaking city and mountain views.
Today's Forecast
5-Day Forecast
Seoul Climate & Weather Averages
Across the year, Seoul swings between average daytime highs of 29°C in August and 2°C in January. Rain peaks in July, while January is typically the driest month. Every figure below comes from daily weather records for 2015–2024 — not long-range estimates.
Few cities change character with the calendar like Seoul. Summer is genuinely warm (29°C average highs in August); winter is genuinely cold (2°C by day in January, -7°C at night), and white: expect snowfall on roughly 15 days a year, mostly from November to March. Pack for the season, not the destination.
| Month | Avg High | Avg Low | Rainfall | Sunshine (h/day) | Wind (km/h) | Snow days |
|---|---|---|---|---|---|---|
| Jan | 2° | -7° | 18 mm | 7.8 | 16 | 5 |
| Feb | 5° | -5° | 26 mm | 8.4 | 18 | 3 |
| Mar | 12° | 0° | 40 mm | 9.1 | 18 | 2 |
| Apr | 18° | 6° | 64 mm | 9.3 | 19 | — |
| May | 23° | 12° | 106 mm | 10 | 19 | — |
| Jun | 27° | 17° | 121 mm | 9.8 | 17 | — |
| Jul | 29° | 22° | 310 mm | 8.2 | 16 | — |
| Aug | 29° | 22° | 260 mm | 9.2 | 15 | — |
| Sep | 25° | 17° | 131 mm | 8.6 | 14 | — |
| Oct | 19° | 9° | 76 mm | 8.3 | 14 | — |
| Nov | 11° | 2° | 59 mm | 7.2 | 15 | 1 |
| Dec | 3° | -5° | 26 mm | 7.2 | 15 | 4 |
Expect around 10 hours of sun a day at the May peak, against about 7.2 hours in November. Wind stays moderate most of the year, strongest in April with daily peaks near 19 km/h.
Best time to visit: Aim for May–September if you can: highs hover near 25°C and rain is lighter than the July peak. Pack strictly by season: summer calls for light layers, winter for a serious coat, hat, and gloves.
Seoul weather — frequently asked questions
When is the best time to visit Seoul?
Weather-wise, May–September is the sweet spot in Seoul: average daytime highs around 25°C with less rain than the July peak. Data from 2015–2024.
What is the rainiest month in Seoul?
July is on average the wettest month in Seoul, with about 310 mm of rainfall. The driest month is typically January, at around 18 mm.
Does it snow in Seoul?
Yes. Seoul averages about 15 days with snowfall per year, falling mostly between November and March.
How hot does Seoul get in summer?
August is the hottest month, with daytime highs averaging 29°C — individual days run hotter still. Nights in August typically stay around 22°C.
How cold are winters in Seoul?
January is the coldest month in Seoul: daytime highs average just 2°C and nights drop to around -7°C.
Source: Open-Meteo ERA5 archive. Averages computed from daily records.