See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
17°
Mostly Clear
Feels Like: 17°
Min: 16°
Max: 28°
The next few hours will be clear, with today reaching 28°C and dropping to 16°C. The coming days will be overcast throughout the day.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:23
Sunrise
18:22
Sunset
Moon
Waxing Gibbous
15:37
Moonrise
01:24
Moonset
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Wednesday
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View stargazing scoreWeather in Sejong today, September 21, 2026
Expect a mostly clear day in Sejong on September 21, 2026, with sunshine dominating from morning through evening. Cloud should stay limited, so the overall feel remains bright and settled. Expect a brighter morning, with limited cloud around 14% by 04:00. Conditions start on a settled note.
The temperature range runs from about 16°C up to 28°C. Moisture in the air spans 35%-96%, with the highest values around 05:00. Expect gentle winds, highest near 21:00 at 2.0 km/h.
Afternoon conditions open up, holding cloud close to 7% near 12:00. The day finishes on a milder, brighter note. Views remain open at about 16.1 km. Expect sunrise at 06:23, sunset at 18:22, and 11 hours 58 minutes of sunlight today overall.
Taken together, settled sunshine in Sejong on September 21, 2026 makes outdoor timing easier, with highs near 28°C.
Frequently asked questions about weather in Sejong
How warm does it get in Sejong?
The warmest month in Sejong is August, with average high temperatures of 31°C. The average temperature during this period is around 27°C.
How cold does it get in Sejong?
The coldest month in Sejong is January, with average low temperatures of -5°C. The average temperature during this period is around -1°C.
What is the wettest time of year in Sejong?
The wettest month in Sejong is July, with an average of 270mm of precipitation.
What is the driest time of year in Sejong?
The driest month in Sejong is January, with an average of 22mm of precipitation.
