October
★ Best time
19° / 10°C
6 rain days
mild
- comfortable temperatures (avg high 19°C / 66°F)
- very low rainfall (only 6 rain days)
Best time to visit Seoul
Seoul, South Korea — ranked month by month from data: temperature, rainfall, snow, and peak hazard seasons. The standouts: October, September, May.
★ Best months to visit
September
★ Best time
26° / 17°C
9 rain days
warm
- comfortable temperatures (avg high 26°C / 79°F)
- manageable rain (9 days)
- warm evenings without humidity overload
May
★ Best time
23° / 13°C
10 rain days
warm, rainy
- comfortable temperatures (avg high 23°C / 73°F)
- manageable rain (10 days)
June
★ Best time
27° / 18°C
11 rain days
warm, rainy
- comfortable temperatures (avg high 27°C / 81°F)
- warm evenings without humidity overload
April
★ Best time
17° / 7°C
9 rain days
mild
- manageable rain (9 days)
August
★ Best time
30° / 22°C
14 rain days
hot, rainy
- warm evenings without humidity overload
OK — shoulder months
July
OK
29° / 22°C
16 rain days
hot, very wet
- warm evenings without humidity overload
November
OK
11° / 3°C
8 rain days
1 snow days
cool
- manageable rain (8 days)
March
OK
10° / 1°C
8 rain days
cool
- manageable rain (8 days)
Months to skip
February
Skip
4° / -3°C
7 rain days
2 snow days
cold, freezing nights
- freezing at night (-3°C)
December
Skip
4° / -3°C
7 rain days
3 snow days
cold, freezing nights, snowy
- freezing at night (-3°C)
January
Skip
2° / -6°C
7 rain days
3 snow days
cold, freezing nights, snowy
- bitterly cold (overnight -6°C)
How we ranked these
Each month is scored on temperature comfort (18–27°C avg high is the sweet spot), rainfall (more rain days = lower score), snow days, and peak hazard seasons (hurricanes, monsoons, etc.). Green-tier months are within ideal range with no major issues. Yellow are workable but with trade-offs. Red has at least one significant problem — extreme heat or cold, heavy rain, or peak storm season.