Click on a day for an hourly weather forecast
The temperatures in Jeju in October are comfortable with low of 17°C and and high up to 20°C.
You can expect about 3 to 8 days of rain in Jeju during the month of October. 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 Jeju in October 2026.
If you’re planning to visit Jeju in the near future, we highly recommend that you review the 14 day weather forecast for Jeju before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 4° | 7 | 18 | 6 | 95 mm | Awful | Jeju in January |
| February | 8° / 5° | 7 | 18 | 3 | 104 mm | Awful | Jeju in February |
| March | 11° / 7° | 7 | 23 | 1 | 123 mm | Bad | Jeju in March |
| April | 15° / 11° | 6 | 24 | 0 | 147 mm | Good | Jeju in April |
| May | 19° / 15° | 5 | 26 | 0 | 143 mm | Good | Jeju in May |
| June | 23° / 19° | 7 | 23 | 0 | 218 mm | Good | Jeju in June |
| July | 27° / 23° | 9 | 22 | 0 | 301 mm | Good | Jeju in July |
| August | 28° / 24° | 8 | 23 | 0 | 277 mm | Good | Jeju in August |
| September | 25° / 21° | 8 | 22 | 0 | 286 mm | Good | Jeju in September |
| October | 20° / 17° | 3 | 28 | 0 | 152 mm | Good | Jeju in October |
| November | 15° / 11° | 5 | 25 | 0 | 103 mm | Good | Jeju in November |
| December | 9° / 6° | 8 | 21 | 3 | 92 mm | Awful | Jeju in December |