Weather | Crisp and comfortable, around 10–20°C (50–68°F) | Cool to cold, around 3–15°C (37–59°F) | Cold and dry, around -5–5°C (23–41°F) |
Crowds | High, especially for foliage weekends | Moderate early, then low to moderate | Low overall, except around Christmas and New Year's |
Atmosphere | Peak autumn color, busy parks, hiking season | Quieter streets, late foliage, more indoor culture | Winter lights, holiday markets, cold-weather comfort food |
Key events | Seoul Street Arts Festival, Silver Grass season, Halloween | Seoul Kimchi Festival, JTBC Seoul Marathon, Seoul Cafe Show | Seoul Lantern Festival, Christmas markets, year-end events |
Public holidays | No major citywide holiday disruption for most visitors | No major public holiday closures | Christmas Day can affect some hours |
Budget | Higher, especially near foliage weekends | Better than October; late-month deals are common | Good value outside holiday weeks |
Best for | Leaf peepers, hikers, photographers | Mixed city trips, shows, markets, easy-paced sightseeing | Winter travelers, festive trips, indoor-heavy itineraries |
Book early? | Yes, for hotels and foliage weekends | Yes for first-week stays, sunset observatories, DMZ tours, and weekend day trips | Yes for holiday shows, markets, and year-end stays |
Transport tips | Parks and mountain routes get busy on weekends | Start early; short daylight matters more than traffic | Dress for cold waits outdoors and allow extra travel time in holiday periods |