Jeju Island (Jejudo) in september: average Weather, Temperature and Climate
Weather in Jeju Island (Jejudo) in september 2025
The weather in Jeju Island (Jejudo) in september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather UV index: 6
Weather at 6am
72°F
Clear/Sunny
28% of time
26%
25%
12%
Weather at 12pm
77°F
Clear/Sunny
33% of time
32%
22%
8%
Weather at 6pm
76°F
Clear/Sunny
37% of time
28%
19%
9%
Weather at 3am
72°F
31%
28%
19%
14%
Evolution of daily average temperature and precipitation in Jeju Island (Jejudo) in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Jeju Island (Jejudo) in september.
The climate of Jeju Island (Jejudo) in september is tolerable
The weather in september in Jeju Island (Jejudo) is wet (with 11.3in of rainfall over 8 days). It should be noted an improvement from the previous month since in august it receives an average of 10.9in of rainfall over 9 days.
The climate nice in this location the month of september. The thermometer averaged maximum of 77°F. The seasonal minimum is 72°F. Thus, the mean temperature average in september in Jeju Island (Jejudo) is 76°F. Note that these seasonal averages are in contrast with those observed in Jeju Island (Jejudo) in september with a maximum record of 86°F in 2021 and a minimum record of 61°F in 2019.
On average, in Jeju Island (Jejudo), the days of september last 12:23. The sun rises at 06:17 and sets at 18:40.
With a good weather, this month is a good month to go there in South Korea.
Jeju Island (Jejudo): another month?
If you can push back the dates of your trip, we advise you to go in october to Jeju Island (Jejudo). more information
September: another location in South Korea?
If you want to go to South Korea in september, there are destinations with better weather than Jeju Island (Jejudo):
In september, Osan has perfect weather.
Furthermore, Seoul, Busan, Andong, Anseong, Cheongju and Chuncheon have good weather.
Seasonal average climate and temperature of Jeju Island (Jejudo) in september
Check below seasonal norms These statistics are generated from the weather statements of the past years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 76°F | ||||
| Highest temperature | 77°F | ||||
| Lowest temperature | 72°F | ||||
| Highest record temperature | 86°F (2021) | ||||
| Lowest record temperature | 61°F (2019) | ||||
| Number of days at +86°F | 0 day(s) (0%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 77°F | ||||
| Lowest sea temperature | 74°F | ||||
| Highest sea temperature | 80°F | ||||
| Wind | |||||
| Wind speed | 24km/h | ||||
| Wind temperature | 72°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 11.3in | ||||
| Number of days with rainfall | 8 day(s) (28%) | ||||
| Record daily rainfall | 10.5in (2019) | ||||
| Other climate data | |||||
| Humidity | 82% | ||||
| Visibility | 9.36km | ||||
| Cloud cover | 46% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 10 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:17 | ||||
| Time of sunset | 18:40 | ||||
| Length of day | 12:23 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Jeju Island (Jejudo) in september 2024:
77°F to 83°F
76°F to 85°F
76°F to 85°F
76°F to 85°F
76°F to 85°F
77°F to 85°F
79°F to 86°F
77°F to 86°F
76°F to 86°F
79°F to 86°F
77°F to 83°F
81°F to 88°F
77°F to 86°F
77°F to 86°F
81°F to 86°F
81°F to 88°F
79°F to 86°F
79°F to 88°F
81°F to 88°F
77°F to 81°F
81°F to 83°F
76°F to 77°F
74°F to 76°F
70°F to 74°F
72°F to 79°F
74°F to 79°F
74°F to 77°F
74°F to 76°F
74°F to 77°F
72°F to 77°F
Map: other cities in South Korea in september
Cities near Jeju Island (Jejudo):
| Gaigeturi in september | tolerable weather |
| Seogwipo in september | tolerable weather |
| Haenam in september | good weather |
| Moppo in september | good weather |
| Muan in september | good weather |
| Naju in september | good weather |
| Yeosu in september | good weather |
| Hwasun in september | good weather |
| Suncheon in september | good weather |
| Gwangju in september | good weather |
| Kwangyang in september | good weather |
| Namhae in september | good weather |
Click over cities on the map for information about the weather in september.
Jeju Island (Jejudo)
perfect weather
good
tolerable
bad
very bad
Weather data for Jeju Island (Jejudo) in september:
Weather data for Jeju Island (Jejudo) for september are derived from an average of the weather forecast since 2009 in Jeju Island (Jejudo). There is a margin of error and these forecasts are to be considered as general information only. The weather in Jeju Island (Jejudo) 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 Jeju Island (Jejudo).