Weather & climate · Seoul

Best Time to Visit South Korea

June and September

The best time to visit South Korea is June and September, when daytime highs in Seoul are around 24–25°C. May and October are also a good time to go. August is the warmest month (28°C by day), January the coldest (-7°C at night), and July the wettest with about 361 mm of rain.

28°C

Warmest: August

-7°C

Coldest nights: January

1241 mm

Rain per year

361 mm

Wettest: July

South Korea weather by month

Jan1°C-7°C20 mm
Feb3°C-5°C31 mm
Mar9°C-1°C37 mm
Apr15°C5°C72 mm
May21°C11°C84 mm
Jun25°C16°C116 mm
Jul27°C21°C361 mm
Aug28°C22°C260 mm
Sep24°C16°C138 mm
Oct18°C10°C53 mm
Nov11°C3°C47 mm
Dec3°C-5°C22 mm

Best time Good Less ideal

Average high Average low Rain (mm per month)

Month	High	Low	Rain	Humidity	Cloud cover	Verdict
January	1°C	-7°C	20 mm	77%	56%	Cold
February	3°C	-5°C	31 mm	74%	52%	Cold
March	9°C	-1°C	37 mm	74%	50%	Fair
April	15°C	5°C	72 mm	74%	53%	Fair
May	21°C	11°C	84 mm	75%	56%	Good
June	25°C	16°C	116 mm	76%	65%	Best time
July	27°C	21°C	361 mm	84%	76%	Rainy
August	28°C	22°C	260 mm	83%	65%	Rainy
September	24°C	16°C	138 mm	79%	57%	Best time
October	18°C	10°C	53 mm	75%	44%	Good
November	11°C	3°C	47 mm	75%	52%	Fair
December	3°C	-5°C	22 mm	76%	55%	Cold

Data: NASA POWER (Prediction Of Worldwide Energy Resources) — 25-year climate averages 2001–2025, public domain, for the area around Seoul (37.55, 126.98). Satellite and model averages — local weather stations can differ by 1–2 °C, and mountains or coasts elsewhere in South Korea have their own climate.

Frequently asked questions

When is the best time to visit South Korea?

June and September. The best time to visit South Korea is June and September, when daytime highs in Seoul are around 24–25°C. May and October are also a good time to go. August is the warmest month (28°C by day), January the coldest (-7°C at night), and July the wettest with about 361 mm of rain.

What is the hottest month in South Korea?

August, with average highs of 28°C in Seoul.

What is the coldest month in South Korea?

January, when nights drop to about -7°C and days reach 1°C.

What is the rainiest month in South Korea?

July with about 361 mm; January is the driest (20 mm).

When should I avoid visiting South Korea?

November is the least comfortable month on average: 11°C by day and 47 mm of rain.

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