What September feels like in Busan
September is early autumn in Busan. Warm daytime weather invites long lunches outside and evening strolls. There is little difference between day and night: nights stay warm, and evenings feel much like the afternoon. High humidity makes the heat feel heavier and sticky, especially on still afternoons.
Rain in Busan in September
Showers are a regular feature, arriving about one day in 3. Rain tends to come in heavy bursts: about 17.1 mm (0.7 in) on an average rainy day. The yearly figure is similar, around 13.8 mm per wet day. It is among the three wettest months of the year.
Daylight and sunshine in September
On 15 September the sun rises at about 6:06 am and sets around 6:33 pm local time, giving 12 h 27 min of daylight. Compared with mid-August, the day has lost 1 h 4 min. The sun is out for roughly 66% of those daylight hours, so there are plenty of bright spells.
How September compares to the rest of the year
In Busan's temperature order, September sits as the 3rd warmest month. Compared with August, afternoons are 3.8°C (6.8°F) cooler, with 8 mm less rain. October is cooler again. By October, typical highs are 20.8°C (69.4°F).
Who September suits
- Sightseeing: a good fit — daytime temperatures are fine for walking around.
- Parks & outdoor: a good fit — pleasant for gardens, parks and riversides.
- Beach: less ideal — too many rainy days.
Tips for visiting Busan in September
Rain Protection
A packable rain jacket saves the day on showery afternoons.
Sunglasses
Plenty of sun, so bring sunglasses and a cap.
Quick questions
How warm is Busan in September?
It feels warm: typical highs are 25.2°C (77.4°F), with lows near 19.9°C (67.8°F).
Does it rain a lot in Busan in September?
It does: about 11 rainy days bring roughly 188 mm, so plan some indoor options.
What should I wear in Busan in September?
Based on the averages: rain protection and sunglasses. There is little need to change for the evening.
Is September or October better for visiting Busan?
On our 12-month climate ranking, October comes out ahead (#1 of 12 vs #7). October is cooler and has fewer rainy days.