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Hourly Forecast
Daylight Hours
06:26
Sunrise
18:24
Sunset
Moon
Waxing Gibbous
15:42
Moonrise
01:24
Moonset
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View stargazing scoreWeather in Incheon today, September 21, 2026
Expect a mostly clear day in Incheon 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 51% by 07:00. Conditions start on a settled note.
The day peaks near 31°C and cools toward 18°C. Moisture in the air spans 18%-78%, with the highest values around 07:00. A lighter breeze peaks around 23:00 near 2.2 km/h.
Later hours favour clearer intervals, as cloud stays near 32% around 12:00. The afternoon is the better half for outdoor time. Expect visibility around 16.1 km. Sunrise is at 06:26 and sunset at 18:24, giving 11 hours 58 minutes of sunlight today.
Taken together, settled sunshine in Incheon on September 21, 2026 makes outdoor timing easier, with highs near 31°C.
Frequently asked questions about weather in Incheon
How warm does it get in Incheon?
The warmest month in Incheon is August, with average high temperatures of 30°C. The average temperature during this period is around 27°C.
How cold does it get in Incheon?
The coldest month in Incheon is January, with average low temperatures of -6°C. The average temperature during this period is around -2°C.
What is the wettest time of year in Incheon?
The wettest month in Incheon is July, with an average of 266mm of precipitation.
What is the driest time of year in Incheon?
The driest month in Incheon is January, with an average of 18mm of precipitation.
