Click on a day for an hourly weather forecast
The weather in Busan in September is hot. The average temperatures are between 21°C and 25°C.
You can expect about 3 to 8 days of rain in Busan 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 Busan in September 2025.
If you’re planning to visit Busan in the near future, we highly recommend that you review the 14 day weather forecast for Busan before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 1° | 2 | 28 | 1 | 26 mm | Bad | Busan in January |
| February | 8° / 3° | 4 | 23 | 1 | 39 mm | Ok | Busan in February |
| March | 12° / 7° | 5 | 26 | 0 | 83 mm | Ok | Busan in March |
| April | 16° / 11° | 5 | 25 | 0 | 99 mm | Good | Busan in April |
| May | 20° / 15° | 4 | 27 | 0 | 91 mm | Good | Busan in May |
| June | 23° / 19° | 5 | 25 | 0 | 135 mm | Perfect | Busan in June |
| July | 26° / 23° | 8 | 23 | 0 | 207 mm | Good | Busan in July |
| August | 28° / 25° | 8 | 23 | 0 | 189 mm | Good | Busan in August |
| September | 25° / 21° | 6 | 24 | 0 | 152 mm | Perfect | Busan in September |
| October | 21° / 16° | 3 | 28 | 0 | 73 mm | Good | Busan in October |
| November | 15° / 10° | 2 | 27 | 0 | 44 mm | Good | Busan in November |
| December | 8° / 4° | 3 | 27 | 1 | 34 mm | Ok | Busan in December |