Tomorrow in Seoul looks
smoky haze, with a high of 76°
and an overnight low of 59°.
Rain is unlikely (1% chance).
Winds top out near 8 mph,
and the UV index reaches 5 (moderate).
Seoul has a humid subtropical climate.
August is the warmest month, with average highs of 85°,
and January the coldest, when nights fall to around 20°.
July brings the most rain, on about 18 days,
while May is the sunniest, with 10.0 hours of sunshine a day.
Over a whole year it rains on roughly 98 days.
January, with highs of 36°F (2°C) and lows near 20°F (-7°C). The coldest day in the 2015-2024 record fell to -3°F (-20°C).
What is the hottest month in Seoul?
August, averaging 85°F (29°C) by day and 72°F (22°C) overnight. The hottest single day in our 2015-2024 record for this location reached 97°F (36°C).
When should I visit Seoul?
Aim for April to June and September to October if you get the choice: these are the warmest and brightest weeks of the year, and highs average 72°F (22°C) against roughly 8 wet days a month. For the same question asked the other way round, see where else is warm in April.
How humid does Seoul get?
Relative humidity averages 70% across the year, which reads as fairly humid. Paired with August heat, muggy afternoons are routine.
Does it snow in Seoul?
Yes - about 5 days a year carry measurable snowfall, concentrated December through March.
Is Seoul cold in winter?
January nights average 20°F (-7°C). Frost and occasional ice are part of the season.
What is the rainiest month in Seoul?
July, at 12.2 inches (310 mm) over about 18 days. January is the driest month, at 18 mm (0.7 in).