September Weather in Osan

Last updated: March 2, 2024

The weather in Osan, South Korea, during September is characterized by an average temperature of 22°C (71°F). Highs can soar to 30°C (85°F), while lows may dip to 11°C (52°F). Typically, the humidity level in Osan throughout September hovers around 77%.

11°C (52°F)

Minimum temperature

22°C (71°F)

Average temperature

30°C (85°F)

Maximum temperature

77%

Humidity

Precipitation and Sunshine hours

In September, Osan averages 136 mm (5.4 inches) of rainfall, typically over the course of 9 rainy days. The month enjoys an average of 12 hours 23 minutes of daylight, with the sun shining for approximately 8 hours 42 minutes each day. Additionally, there is a 39% probability of sunny days during this period.

136 mm (5.4 inches)

Precipitation

9 rainy days

Rainy days

8 hours 42 minutes

Sunshine hours

39%

Chance of sun

UV Index

In September, the UV Index in Osan reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 15 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00
UVI	1	2	4	6	8	9	9	8	5	3	1	1	0
Exposure	Low		Moderate	High	VeryHigh				Moderate		Low
Time to burn	45 min		30 min	25 min	15 min				30 min		45 min