Temperatures in September
It's warm in September in Seoul 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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Seoul in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Seoul with hot temperatures, averaging around 28°C during the day and nights close to 20°C. Plenty of days with a chance of precipitation.
Since temperatures can differ between day and night, it’s a good idea to dress in layers.
Mid-September
By mid-September, the average daytime temperature stays the same at 28°C, with nights close to 19°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
Temperatures vary between day and night, so it’s smart to wear layers.
End of September
By the end of September, the average daytime temperature in Seoul will be around 26°C, with nights close to 17°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
As it gets cooler in the evening, it’s best to wear layers.
Precipitation in September
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.
The average precipitation chance is 31% per day this month.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Seoul. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Seoul in September |
London | ||
|---|---|---|---|
 Average Temperature |
27°C | 20°C | |
 High Temp |
29°C | 22°C | |
| Low Temp |
25°C | 17°C | |
 Total Precipitation |
149 mm | 44 mm | |
| Rainy Days |
9 days | 8 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 Seoul?
After some sun? Then September isn’t the best time to be in Seoul. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Seoul in September
With 32°C, Seoul hit the highest temperature in the last 10 years in September 2019. The lowest daytime temperature in this month was 20°C in 2019. The extreme night temperatures ranged from a low of 9°C to a high of 24°C.
Check out the climate of Seoul for all months and discover the best travel time
Curious about the climate in other parts of South Korea? Check out the weather and climate in places like Busan, or have a look at other destinations in South Korea.
Daily Temperature in September in Seoul
This chart shows the average daily temperatures, both day and night, for each day in September in Seoul, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Weather experiences in September in Seoul
Good
Warm but not too hot, about 25 degrees. Fairly sunny, but oc... more
Daily Precipitation in September in Seoul
The chart below shows the average daily precipitation in September for Seoul, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 9 days of rain in Seoul.
Daily UV Index in September in Seoul
This chart shows the average daily UV index in September in Seoul, 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 Seoul Over the Years
This chart shows the average temperature in September in Seoul, measured in degrees Celsius, over the past years.
Total Precipitation in September in Seoul Over the Years
This chart shows the average precipitation in September in Seoul, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Seoul
Click on a specific day in September for detailed info on the typical weather on that day in Seoul. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Seoul
The weather in September in Seoul is rated 4 out of 5 stars by 1 visitor. Have you been to Seoul? Share your weather experience to help other visitors.
Write your own review
Warm but not too hot, about 25 degrees. Fairly sunny, but occasionally rainy. Not exactly a seaside resort, but fine for exploring the city.— This text is automatically translated to English
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Average Weather in Seoul by Month
Click on a month below to see detailed weather info for Seoul. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
