South KoreaThe weather in September in Seoul
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.
Looking for sun? September isn’t a good month to be in Seoul. 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 Seoul, 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, Seoul 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 Seoul
Click on any day in September to get detailed info about the usual weather on that day in Seoul. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Seoul | 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 Seoul 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 Seoul 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 Seoul for all months and discover the best travel time
Curious about the weather in other parts of South Korea? Check out the climate and weather for spots like Busan, or explore other destinations in South Korea.
Temperature charts
These charts show the average temperatures in September in Seoul, 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 Seoul
Temperature in September in Seoul over the years
Precipitation charts
These charts show the average amount of precipitation in September in Seoul, 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 Seoul
Total precipitation in September in Seoul over the years
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.
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.
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Warm but not too hot, about 25 degrees. Pretty 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.