The weather in September in South Korea
It's warm in September in South Korea with an average temperature of 27°C. Temperatures this month range from a low of 25°C to a high of 29°C. At night, you can expect temperatures between 15°C and 20°C.
Looking for sun? September isn’t a good month to be in South Korea. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for South Korea. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 32°C in 2019, South Korea reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 20°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 9°C to a highest value of 24°C.
Rainfall amount
In September, there is an average of 149 mm of precipitation, spread over 16 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in September for South Korea
Click on any day in September to get detailed info about the usual weather on that day in South Korea. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| South Korea | New York | |
|---|---|---|
| Average temperature | 27°C | 27°C |
| Max. temperature | 29°C | 31°C |
| Min. temperature | 15°C | -5°C |
| Total precipitation | 149 mm | 57 mm |
| Rainy days | 16 days | 9 days |
Start of September
The month of September starts in South Korea with hot temps, averaging around 28°C during the day and nights around 20°C.
Mid September
By mid-September, daytime temps stay steady at around 28°C, with nights around 19°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in South Korea is around 26°C, while nighttime temps are about 17°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Check out the climate of South Korea for all months and discover the best travel time
The climate in South Korea is based on weather data from Seoul. Other places, like Busan, might have different weather. You can check out all destinations in South Korea to get the full picture of the climate.
Temperature charts
These charts show the average temperatures in September in South Korea. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in South Korea
Temperature in September in South Korea over the years
Precipitation charts
These charts show the average amount of precipitation in September in South Korea. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in South Korea
Total precipitation in September in South Korea over the years
Daily UV index in September in South Korea
This chart shows the average daily UV index in September in South Korea, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in South Korea
Have you been to South Korea in September?
Share your weather experience in September in South Korea.
Average weather in South Korea by month
Click on a month below to see detailed weather info for South Korea. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.