Seoul in september: average Weather, Temperature and Climate
Weather in Seoul in september 2025
The weather in Seoul in the month of september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 6
Weather at 6am
67°F
Clear/Sunny
39% of time
23%
15%
12%
Weather at 12pm
79°F
Clear/Sunny
46% of time
29%
16%
6%
Weather at 6pm
76°F
Clear/Sunny
46% of time
28%
14%
7%
Weather at 3am
68°F
43%
23%
13%
9%
Evolution of daily average temperature and precipitation in Seoul in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Seoul in september.
The climate of Seoul in september is good
The weather in september in Seoul is rather dry (with 6in of precipitation over 5 days). It should be noted an improvement from the previous month since in august it receives an average of 12.6in of precipitation over 11 days.
The climate good in that area the month of september. The thermometer averaged maximum of 81°F. The seasonal minimum is 67°F. Thus, the mean temperature average on this month of september in Seoul is 74°F. These temperatures are far removed from those records observed in Seoul in the month of september with a maximum record of 95°F in 2020 and a minimum record of 47°F in 2010. You can plan to have about 5 days with temperatures over 86°F, or 17 of the month.
On average, in Seoul, the days of september last 12:26. The sun rises at 06:14 and sunset is at 18:40.
With a good weather, this month is a good month to go there in South Korea.
Seasonal average climate and temperature of Seoul in september
Check below seasonal norms These statistics are generated from the weather statements earlier years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 74°F | ||||
| Highest temperature | 81°F | ||||
| Lowest temperature | 67°F | ||||
| Highest record temperature | 95°F (2020) | ||||
| Lowest record temperature | 47°F (2010) | ||||
| Number of days at +86°F | 5 day(s) (17%) | ||||
| Number of days at +65°F | 29 day(s) (97%) | ||||
| Wind | |||||
| Wind speed | 11km/h | ||||
| Wind temperature | 67°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 6in | ||||
| Number of days with rainfall | 5 day(s) (17%) | ||||
| Record daily rainfall | 4.2in (2020) | ||||
| Other climate data | |||||
| Humidity | 82% | ||||
| Visibility | 9.24km | ||||
| Cloud cover | 33% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:14 | ||||
| Time of sunset | 18:40 | ||||
| Length of day | 12:26 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Seoul in september 2024:
76°F to 85°F
74°F to 77°F
76°F to 85°F
76°F to 86°F
76°F to 85°F
77°F to 83°F
76°F to 85°F
76°F to 86°F
77°F to 88°F
77°F to 88°F
77°F to 92°F
79°F to 83°F
74°F to 76°F
76°F to 85°F
76°F to 86°F
74°F to 90°F
79°F to 86°F
79°F to 86°F
79°F to 86°F
79°F to 83°F
63°F to 68°F
67°F to 74°F
63°F to 76°F
65°F to 79°F
67°F to 79°F
72°F to 79°F
70°F to 81°F
70°F to 83°F
68°F to 81°F
70°F to 79°F
Map: other cities in South Korea in september
Cities near Seoul:
| Goyang-si in september | good weather |
| Namyangju in september | good weather |
| Incheon in september | good weather |
| Ansan-si in september | good weather |
| Yangju in september | good weather |
| Hwaseong-si in september | good weather |
| Yangp'yong in september | good weather |
| Osan in september | perfect weather |
| Icheon-si in september | good weather |
| Namiseom (Nami Island) in september | good weather |
| Anseong in september | good weather |
| Chuncheon in september | good weather |
Click over cities on the map for information about the weather in september.
Seoul
perfect weather
good
tolerable
bad
very bad
Weather data for Seoul in september:
Weather data for Seoul for september are derived from an average of the weather forecast since 2009 in Seoul. There is a margin of error and these forecasts are to be considered as general information only. The weather in Seoul can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Seoul.