Osan Weather in September
September in Osan averages 27°C (81°F) during the day and 17°C (63°F) at night. Quite a bit of rainfall is typical this month, with around 134 mm (5.3 in) on average. An umbrella is a good idea.
Rainfall in Osan in September
Based on our climate data of the past 30 years, about 8 days of rain are anticipated, with 134 mm (5.3 in) on average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Osan in September
In September, Osan gets high temperatures, with highs of 27°C (81°F). Nights cool to around 17°C (63°F). This kind of day-to-night contrast is typical for this time of year. With lows of 17°C (63°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Osan in September
Expect a lot of sunshine this month, with about 197 hours of sun. These sunny conditions add to the overall experience.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May and October typically offer the best weather for Osan.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Osan's climate page.
Osan Temperature in September
Min Temperature
17°C (63°F)
Max Temperature
27°C (81°F)
Chance of Rain
28%
Precipitation
134 mm (5.3 in)
Rainy days
8 days
Humidity
76% *
Sunshine
197 hours *
Percentage Sunshine
53% *
Best Places in South Korea in September
Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in September →
perfect weather
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unpleasant
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What to Wear in Osan in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Osan in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Osan's climate page.
Temperature Rainfall Sunshine Humidity
See the full Osan climate overview or explore weather in South Korea.
