Climate almanac
Osan
Gyeonggi-do, South Korea · 37.15°, 127.07°
What is the weather like in Osan in September?
In September, Osan is typically 80°F (26°C) during the day and 65°F (19°C) at night. The month brings about 5.8 in (146 mm) of precipitation in total.
- Average high80°F (26°C)
- Average low65°F (19°C)
- Precipitation5.8 in (146 mm)
- Clear or mostly clear days9
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)