October
Best time
19°C / 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.
About Seoul
Seoul, officially Seoul Special Metropolitan City, is the capital and largest city of South Korea, and the largest city in the whole of Korea. The broader Seoul Metropolitan Area, encompassing Seoul, Gyeonggi Province and Incheon, emerged as the world's sixth largest metropolitan economy in 2022, behind New York, Tokyo, Los Angeles, Paris, and London, and hosts more than half of South Korea's population. Although Seoul's population peaked at over 10 million, it has gradually decreased since 2014, standing at about 9.6 million residents as of 2024.
— condensed from Wikipedia
Best months to visit
September
Best time
26°C / 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°C / 13°C
10 rain days
warm, rainy
- comfortable temperatures (avg high 23°C / 73°F)
- manageable rain (10 days)
June
Best time
27°C / 18°C
11 rain days
warm, rainy
- comfortable temperatures (avg high 27°C / 81°F)
- warm evenings without humidity overload
April
Best time
17°C / 7°C
9 rain days
mild
- manageable rain (9 days)
August
Best time
30°C / 22°C
14 rain days
hot, rainy
- warm evenings without humidity overload
OK — shoulder months
July
OK
29°C / 22°C
16 rain days
hot, very wet
- warm evenings without humidity overload
November
OK
11°C / 3°C
8 rain days
1 snow days
cool
- manageable rain (8 days)
March
OK
10°C / 1°C
8 rain days
cool
- manageable rain (8 days)
Months to skip
February
Skip
4°C / -3°C
7 rain days
2 snow days
cold, freezing nights
- freezing at night (-3°C)
December
Skip
4°C / -3°C
7 rain days
3 snow days
cold, freezing nights, snowy
- freezing at night (-3°C)
January
Skip
2°C / -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.
🇰🇷 Korean survival phrases
The 16 phrases that will earn you smiles, food, and help when you need it. English-speaking travellers — start with the first 4 and add the rest as needed.
Hello
안녕하세요
annyeonghaseyo
Thank you
감사합니다
gamsahamnida
Please
주세요
juseyo
Yes / No
네 / 아니요
ne / aniyo
Excuse me
실례합니다
sillyehamnida
Do you speak English?
영어 할 줄 아세요?
yeongeo hal jul aseyo
I don't understand
이해 못해요
ihae mothaeyo
How much?
얼마예요?
eolmayeyo
The bill, please
계산서 주세요
gyesanseo juseyo
Water
물
mul
Where is…?
…어디예요?
eodieyo
Bathroom
화장실
hwajangsil
Help!
도와주세요
dowajuseyo
Call the police
경찰을 불러주세요
gyeongchareul bulleojuseyo
I need a doctor
의사가 필요해요
uisaga piryohaeyo
I'm allergic to…
…에 알레르기가 있어요
e allereugiga isseoyo
Pronunciations are rough English approximations — they'll get you understood, even if your tones aren't perfect.