Osan is a city of approximately 239,000 people in Gyeonggi-do, South Korea. Located in the Korea Standard Time zone at 37.2°N latitude.
Recent weather here gives a sense of typical conditions: in 2025, Osan recorded a mean annual temperature of 55°F, ranging from 10°F lows in February to 98°F highs in July, with about 53 inches of precipitation across the year.
View historical weather for Osan · More cities in Gyeonggi-do