Verdict: Excellent month
Busan Weather in September
September hits the sweet spot in Busan — highs around 26°C (79°F), ideal for a full day on foot. Expect showers on roughly 13 days of the month — rarely trip-ruining, worth planning around. Overall, September is one of the best months of the year to be in Busan.
Average high
26°C / 79°F
Average low
20°C / 68°F
Rain days
~13
Precipitation
228 mm
What to pack for Busan in September
- Summer clothes, plus one light layer for air-con and evenings
- Rain gear is non-negotiable — expect rain on roughly 13 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Busan: Aug (30°C / 86°F) · Coolest: Jan (7°C / 45°F) · Wettest: Jul (~20 rain days)
7°
-3°
Jan
9°
0°
Feb
14°
4°
Mar
18°
8°
Apr
22°
13°
May
26°
18°
Jun
28°
23°
Jul
30°
24°
Aug
26°
20°
Sep
21°
12°
Oct
15°
5°
Nov
7°
-2°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)