What is the weather like in Busan vs Seoul in September?

In September, Busan averages 27°C high / 21°C low with about 237 mm of rain; Seoul averages 28°C high / 19°C low with about 148 mm.

Busan vs Seoul in September

Seoul is the better pick in September — 75 vs 65 on SeasonMap's comfort score. Seoul is hot, rainy, muggy air, while Busan is hot, soaked, clean air.

Busan vs Seoul — September climate, side by side

	🇰🇷 Busan	🇰🇷 Seoul
Comfort score	65/100 (C)	75/100 (B)
Feels-like high	30°C	30°C
Avg high / low	27° / 21°	28° / 19°
Rainfall	237 mm	148 mm
Rainy days	13	9
Humidity	79%	79%
Air quality (AQI)	47	73

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Busan 🇰🇷 South Koreahot, soaked, clean air · best May65
Seoul 🇰🇷 South Koreahot, rainy, muggy air · best May75

Busan vs Seoul in September — FAQ

Is September better in Busan or Seoul?: Seoul is the better pick in September — 75 vs 65 on SeasonMap's comfort score. Seoul is hot, rainy, muggy air, while Busan is hot, soaked, clean air.
What is the weather like in Busan vs Seoul in September?: In September, Busan averages 27°C high / 21°C low with about 237 mm of rain; Seoul averages 28°C high / 19°C low with about 148 mm.