Weather in Osan in September
Osan, South Korea averages a high of 25.1°C (77.2°F) and low of 17°C (62.6°F) in September, with 8 rain days and 8.6 hours of daily sunshine. Travel score: 81.9/100 (Excellent). The best time to visit Osan is June.
High
25°C77°F
Low
17°C63°F
🌧️
8
rain days
☀️
8.6
hrs/day sunshine
💧
77%
humidity
82— Excellent
September in Osan is warm and mostly dry — excellent conditions for exploring.
What are the average temperatures in Osan?
How much does it rain in Osan in September?
Osan receives an average of 125.8mm of rainfall across 8 rainy days in September. The annual total is 1139.8mm.
What should I pack for Osan in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 25°C
🧴
Sunscreen SPF 30+
9 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to South Korea in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
🏛️ 121 countries·📅 Updated yearly·✈️ Free forever
Compare Osan
Popular comparisons:
How can I plan my trip to Osan?
What other cities are near Osan?
What are other popular cities in South Korea?
What is the weather like in other months in Osan?
Data based on 1994–2024 averages · Last updated: 2024-12-31