Click on a day for an hourly weather forecast
The temperatures in Ulleungdo in September are comfortable with low of 18°C and and high up to 26°C.
You can expect about 3 to 8 days of rain in Ulleungdo during the month of September. 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 Ulleungdo in September 2025.
If you’re planning to visit Ulleungdo in the near future, we highly recommend that you review the 14 day weather forecast for Ulleungdo before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -5° | 3 | 22 | 7 | 24 mm | Awful | Ulleungdo in January |
| February | 4° / -2° | 2 | 22 | 4 | 36 mm | Awful | Ulleungdo in February |
| March | 11° / 3° | 4 | 25 | 2 | 60 mm | Bad | Ulleungdo in March |
| April | 17° / 8° | 5 | 25 | 0 | 83 mm | Good | Ulleungdo in April |
| May | 23° / 14° | 5 | 26 | 0 | 118 mm | Perfect | Ulleungdo in May |
| June | 27° / 18° | 6 | 24 | 0 | 142 mm | Perfect | Ulleungdo in June |
| July | 29° / 22° | 11 | 20 | 0 | 424 mm | Ok | Ulleungdo in July |
| August | 30° / 23° | 10 | 21 | 0 | 320 mm | Ok | Ulleungdo in August |
| September | 26° / 18° | 5 | 25 | 0 | 153 mm | Perfect | Ulleungdo in September |
| October | 20° / 12° | 3 | 28 | 0 | 74 mm | Good | Ulleungdo in October |
| November | 12° / 6° | 4 | 24 | 2 | 79 mm | Bad | Ulleungdo in November |
| December | 3° / -3° | 3 | 21 | 7 | 36 mm | Awful | Ulleungdo in December |