See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
29°
Mostly Clear
Feels Like: 28°
Min: 19°
Max: 30°
The next few hours will be partly cloudy, with today reaching 30°C and dropping to 18°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:25
Sunrise
18:23
Sunset
Moon
Waxing Gibbous
15:41
Moonrise
01:22
Moonset
Daily Forecast
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View stargazing scoreWeather in Seoul today, September 21, 2026
Seoul sees a largely clear day on September 21, 2026, interrupted by cloudier skies around 13:00. Plan for bright conditions either side of that cloudier interval.
Expect highs of 30°C and cooler readings close to 19°C. Relative humidity sits between 23% and 55%, reaching its peak around 23:00. A lighter breeze peaks around 21:00 near 2.2 km/h.
Afternoon conditions open up, holding cloud close to 29% near 13:00. The day finishes on a milder, brighter note. Views remain open at about 16.1 km. Expect sunrise at 06:25, sunset at 18:23, and 11 hours 58 minutes of sunlight today overall.
The practical takeaway for Seoul is a bright September 21, 2026, ideal for outdoor errands before temperatures ease from about 30°C.
Frequently asked questions about weather in Seoul
How warm does it get in Seoul?
The warmest month in Seoul is August, with average high temperatures of 30°C. The average temperature during this period is around 26°C.
How cold does it get in Seoul?
The coldest month in Seoul is January, with average low temperatures of -7°C. The average temperature during this period is around -2°C.
What is the wettest time of year in Seoul?
The wettest month in Seoul is July, with an average of 287mm of precipitation.
What is the driest time of year in Seoul?
The driest month in Seoul is January, with an average of 20mm of precipitation.
