When Should You Visit Seoul?
Top months: Apr · May · Sep · Oct. Compare 12-month weather, festivals, and pricing on one page to find your match.
Quick Answer
The best time to visit Seoul is Apr · May · Sep · Oct. These months balance pleasant weather, festival programming, and manageable crowds — the canonical first-visit pick. For lower fares and hotels, target the off-season (January-February, mid-July (monsoon)), but expect colder or wetter weather.
Seoul by Season
🌸 Spring (Mar-May)
- • First spring blossoms begin (forsythia, magnolia, then cherry late month)
- • Air pollution from Chinese fine dust (mihaedi) season peaks early March
- • Independence Movement Day (March 1) — public holiday
☀️ Summer (Jun-Aug)
- • Pre-monsoon humidity climbs
- • World Cup-style fan culture (during summer tournaments)
- • Korean Memorial Day (June 6) — public holiday
🍁 Fall (Sep-Nov)
- • Chuseok (Korean Thanksgiving) — major holiday, varies year to year (typically late September)
- • Typhoon season peaks early-to-mid September
- • Korean Music Festival season begins
❄️ Winter (Dec-Feb)
- • Lunar New Year (varies — late January or February) — major holiday, families travel
- • Winter sales at department stores
- • Pyeongchang Trout Festival (1.5h from Seoul)
Month-by-Month at a Glance
| Month | Temp (°C) | Rain | What to Pack | Crowds·Pricing |
|---|---|---|---|---|
| January | 2/-6 | 6d | Heavy waterproof down coat, scarf, gloves, hat. Layered with thermal base. Snow boots advisable. Korean winters are brutally cold and dry. | Low |
| February | 5/-4 | 5d | Same as January — heavy coat, scarf, gloves. Slightly milder by late month, but still snow boots advisable. | Low |
| March | 11/1 | 7d | Light to medium jacket, sweater layers. Late March hits 17°C / 63°F daytime but mornings still cool (1-5°C / 34-41°F). Light scarf for evenings. | Mid |
| ★ April | 18/7 | 8d | Light layers — sweater + light jacket. Sunscreen for outdoor walks. Folding umbrella for spring showers. | High |
| ★ May | 23/13 | 9d | Spring/light summer — short sleeves with light cardigan. Daytime warm (23-25°C), evenings cooler (13-15°C). Sunscreen essential. | High |
| June | 28/18 | 10d | Summer light — short sleeves and cotton. Light cardigan for over-AC indoors. Sunscreen and hat for outdoor walks; UV index 9 is genuinely strong. | Mid |
| July | 30/22 | 16d | Light tropical-style clothing. Quick-dry fabrics recommended. Folding umbrella mandatory — monsoon (jangma) season. | Mid |
| August | 31/22 | 14d | Light tropical-style clothing. Quick-dry fabrics. Light cardigan for AC restaurants and shops. Folding umbrella mandatory. | High |
| ★ September | 27/17 | 10d | Short sleeves + light cardigan. Daytime mild (24-27°C), evenings cooler (17-19°C). Crisp Korean autumn light begins late month. | High |
| ★ October | 19/9 | 6d | Long sleeves and light jacket. Daytime mild (18-20°C), evenings cooler (10-12°C). Ideal for long walks and outdoor sightseeing. | High |
| November | 11/2 | 6d | Heavy coat or trench, sweater layers underneath. Mornings cool (3°C / 37°F), daytime mild (12°C / 54°F). Daylight shortening fast. | Mid |
| December | 4/-4 | 5d | Heavy down coat, scarf, gloves, hat. Layered with thermal base. Snow boots advisable. Daytime 4°C / 39°F, evenings drop to -4°C / 25°F. | Mid |
★ = recommended season. Full month guides on the monthly weather pages.
Seasonal Pricing Trends
Cherry blossom season (April) at Yeouido and Seokchon Lake is peak season for both tourists and Koreans. Book 6+ weeks ahead. October has the most stable weather of the year.
May post-cherry blossom is fine weather and lighter crowds. June-July is humid with monsoon late June. November is cool-and-clear before December cold sets in.
January-February is bitter cold (-6 to 5°C / 21-41°F) but Lotte World Theme Park is empty and skiing day-trip to nearby resorts is excellent. Mid-July monsoon brings 200mm+ rain weekly — most days have 1-2 hour heavy showers but evenings clear.
Frequently Asked Questions
When is the best time to visit Seoul?
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Why you can trust this guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.