Average weather for South Korea in September
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.
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. There are plenty of days with a good chance of precipitation.
With the temperature difference between day and night, it’s smart to wear layers.
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.
Since it cools down at night, it’s a good idea to wear layers.
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.
Because temperatures drop in the evening, wearing layers is recommended.
In September, there is an average of 149 mm of precipitation, spread over 9 days. The wind speed is around 3 Bft, mostly coming from the South.
South Korea in September |
New York | ||
|---|---|---|---|
 Average temperature |
27°C | 27°C | |
 Max. temperature |
29°C | 31°C | |
| Min. temperature |
25°C | -5°C | |
 Total precipitation |
149 mm | 57 mm | |
| Rainy days |
9 days | 9 days | |
August
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.
Is September a good time to visit South Korea?
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.
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.
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.
Daily Temperature in September in South Korea
This chart shows the average daily high and low temperatures in September for South Korea, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in South Korea
The chart below shows the average daily precipitation in September for South Korea, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 9 days of precipitation in South Korea.
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.
Temperature in September in South Korea over the years
This chart shows the average temperature in September in South Korea, measured in degrees Celsius, over the past few years.
Total precipitation in September in South Korea over the years
This chart shows the average precipitation in September in South Korea, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
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.
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.
Or check out the climate of South Korea for all months at once
