The weather in South Korea in September is hot. The average temperatures are between 68°F and 78°F.
You can expect about 3 to 8 days of rain in South Korea during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in South Korea in September 2025.
If you’re planning to visit South Korea in the near future, we highly recommend that you review the 14 day weather forecast for South Korea before you arrive.
Temperatures
78° / 68°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
6.14
in
Sun Hours
10.3
Hrs
