Busan weather in September
September is a fair month to visit Busan: highs of 25°C (76°F) and about 176 mm (6.9 in) of rain on average. Nights average 19°C (67°F) and cloud cover 67% (NASA POWER, 2001–2025 averages). It is the 3rd wettest month of the year and the 3rd warmest. Compared with August, it is cooler and drier; October brings highs of 20°C (68°F) and 75 mm (3.0 in) of rain.
Figures are long-term averages for Busan, the largest city in Busan. See below for other places.
Is September a good time to visit Busan?
fair month Weather score 57/100.
September is a fair month in Busan. The weather is usually best in Oct–Nov.
Does it rain a lot in Busan in September?
Yes, it is one of the rainy months: about 176 mm (6.9 in) falls in an average September. It is the 3rd wettest month of the year.
How warm is Busan in September?
Days average 25°C (76°F) and nights 19°C (67°F).
Busan weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 6°C (42°F) | -1°C (30°F) | 30 mm | 55% | least pleasant |
| February | 8°C (46°F) | 1°C (33°F) | 52 mm | 60% | least pleasant |
| March | 12°C (53°F) | 4°C (39°F) | 79 mm | 57% | fair |
| April | 17°C (62°F) | 9°C (47°F) | 137 mm | 58% | fair |
| May | 21°C (69°F) | 13°C (56°F) | 144 mm | 62% | fair |
| June | 24°C (75°F) | 18°C (64°F) | 175 mm | 73% | fair |
| July | 26°C (80°F) | 22°C (72°F) | 299 mm | 73% | least pleasant |
| August | 28°C (82°F) | 24°C (74°F) | 244 mm | 66% | least pleasant |
| September | 25°C (76°F) | 19°C (67°F) | 176 mm | 67% | fair |
| October | 20°C (68°F) | 13°C (56°F) | 75 mm | 54% | best |
| November | 14°C (58°F) | 7°C (45°F) | 46 mm | 51% | best |
| December | 8°C (46°F) | 1°C (34°F) | 33 mm | 52% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Busan in September
Weather can differ a lot within Busan: coasts, hills and mountains each have their own climate.