Osan weather in September (Gyeonggi-do, South Korea)

How is the weather in Osan in September? Wondering if it's an optimal time for a visit? This page provides detailed information on the weather conditions for that month.

In September, Osan generally has high temperatures and high rainfall. Throughout the day, temperatures typically settle at around 27°C. But by evening, they drop to around 17°C.

Osan in September usually receives high rainfall, averaging around 134 mm for the month. When we look at the climate data from the last 30 years, we can expect around 8 days of rain.

The days are predominantly sunny, with an estimated total of around 197 hours of sunshine. This amount of sunlight does not only brightens the days but also contributes to a cheerful ambiance in the area during this month.

If you prefer dry days with pleasant temperatures, May and October typically offer the best circumstances. While January, February, July and August tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Osan climate page with graphs.

 

Osan, monthly averages in September

Min Temperature 17°C  

Max Temperature 27°C  

Chance of Rain 28%  

Precipitation 134 mm  

Rainy days 8 days  

Humidity 76% *  

Sunshine 197 hours *  

Percentage Sunshine 53% *  

* Data from: Cheonan, South Korea (38 KM, 23 Miles).

Where to go in South Korea in September

Find out more about the weather in South Korea in September and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Osan in September?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Osan.

Our site offers climate and forecast data for every country in the world. Are you going to South Korea? On this website you can find historical weather averages for many cities in South Korea. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.