See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
25°
Clear
Feels Like: 25°
Min: 14°
Max: 28°
The next few hours will be clear, with today reaching 28°C and dropping to 17°C. The coming days will be cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:20
Sunrise
18:31
Sunset
Moon
Waxing Crescent
11:24
Moonrise
21:03
Moonset
Daily Forecast
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Weather in Osan today, September 16, 2026
Sunshine leads the day in Osan on September 16, 2026, with a patch of cloud building near 23:00. The broader outlook stays fair despite that temporary thickening.
The day peaks near 28°C and cools toward 14°C. The air stays humid, with relative humidity between 44% and 66% and the peak around 23:00. Winds stay light, near 2.5 km/h by 23:00, so the day feels still more than breezy.
Expect a more open afternoon, with limited cloud around 24% by 23:00. Residual damp risk should be lower than earlier. Visibility stays near 16.1 km. Sunrise is at 06:20 and sunset at 18:31, giving 12 hours 11 minutes of sunlight today.
Overall, Osan on September 16, 2026 favours outdoor plans under mostly open skies, with a comfortable high near 28°C.
Frequently asked questions about weather in Osan
How warm does it get in Osan?
The warmest month in Osan 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 Osan?
The coldest month in Osan is January, with average low temperatures of -6°C. The average temperature during this period is around -1°C.
What is the wettest time of year in Osan?
The wettest month in Osan is July, with an average of 269mm of precipitation.
What is the driest time of year in Osan?
The driest month in Osan is January, with an average of 21mm of precipitation.
