South Korea weather in September 2025

Expect 77°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in South Korea in September. Check more long-term weather averages for South Korea in September before you book your next holiday to South Korea in 2025/2026.

  • 77°F maximum daytime temperature in September in South Korea (Seoul)77
    77°F max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in September in South Korea (Seoul)9
    9 days with some rainfall
  • 61°F minimum night-time temperature in September in South Korea (Seoul)61
    61°F min night temperature
  • 12 hours of daylight per day in September in South Korea (Seoul)12
    12 hours of daylight per day
  • Low heat & humidity in September in South Korea (Seoul)L
    Low heat & humidity
  • 6.3 inches monthly rainfall in September in South Korea (Seoul)6.3
    6.3 inches of monthly rainfall
  • UV (maximum) index 7 (High) in September in South Korea (Seoul)7
    7 (High) UV index

More about South Korea

South Korea by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for South Korea

  • Save up to £1,000 per person on last minute tours
  • Book late availability on Wendy Wu Tours worldwide
  • Check out tours departing in the coming months

The September weather guide for South Korea (Seoul) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top South Korea destinations

Below are average maximum temperatures at popular countries, regions and places in South Korea in September. Select a holiday destination to see more weather parameters.

All South Korea destinations

Metric (°C)  |  Imperial (°F)

Back to top

How hot is it in South Korea in September?

Daytime temperatures usually reach 77°F in Seoul, South Korea in September with low heat and humidity, falling to 61°F at night.

How sunny is it in South Korea in September?

There are normally 7 hours of bright sunshine each day in Seoul, South Korea in September - that's 54% of daylight hours.

Does it rain in South Korea in September?

There are usually 9 days with some rain in Seoul, South Korea in September and the average monthly rainfall is 6.3 inches.

What is the chance of a typhoon in South Korea in September?

On average less than 1 day in September in Seoul, South Korea is likely to be affected by the passage of one or more tropical storms.

South Korea September sunrise & sunset times

Browse the sunrise and sunset times for South Korea in September 2025. Select a month to view South Korea sunrise and sunset times for the next 12 months. The South Korea sunrise and sunset times shown below are for Seoul.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:02 19:01
Monday, 15th September 2025 06:14 18:40
Tuesday, 30th September 2025 06:26 18:17

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^