Seoul Weather in September
In September, Seoul averages a high of 26°C (78°F) and a low of 16°C (61°F), based on 50 years of historical weather data from SEOUL CITY.
26°C
Average high
78°F
16°C
Average low
61°F
36°C
Record high
97°F · 1975
2°C
Record low
35°F · 1987
What to Expect in Seoul in September
Typical September days in Seoul reach 26°C (78°F) during the afternoon and cool to around 16°C (61°F) overnight. On average, measurable rain falls on about 29% of days this month. Over the past 50 years, September temperatures in Seoul have ranged from a record high of 36°C (1975) down to a record low of 2°C (1987).
For a day-by-day look or other months, see the full Seoul weather history.