Weather in South Korea in September
September in South Korea is warm outdoor weather. Days are long enough to be useful. Shade starts to matter at midday.
A country pin in September is a warning: one region of South Korea will not match another. Use a city page if you already know where you are going. Compared with August and January, September sits in the middle of South Korea's year.
- Average temp
- 22°C
17–26°C
- Rainfall
- 158 mm
A wet month
- Sunshine
- 5.9 h
hours per day
What to expect
Daytime
Warm days in South Korea in September. A hat starts to earn its keep at midday. Evenings are the comfortable part of the clock.
You can walk at more hours than in the fierce months. Still build in a pause when the sun is high. Nights are easy.
Rain
September is a wetter month in South Korea. Showers are part of the deal, not a spoiled surprise.
Waterproof shoes matter more than a rain plan for a beach, especially if a beach is not why you came. Build indoor hours into the afternoon.
Evening
Evenings are cooler. A layer helps after sunset.
What to pack
Rain jacket
A layer for cooler evenings
Where to stay in South Korea
Featured stays on trip1. Dates are a starting point for September.
Travel guides for South Korea
What to read before you book.
Average weather in South Korea
TemperatureRainfall
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
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FAQs about South Korea
Climate averages for South Korea, 1991–2020.
The best time to visit South Korea is between May and October, the most comfortable stretch of the year on these averages.
August is the hottest month, with an average around 27°C.
August is the wettest month, with about 315 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
