What is the weather like in Incheon vs Jeju in September?

In September, Incheon averages 26°C high / 19°C low with about 148 mm of rain; Jeju averages 27°C high / 22°C low with about 239 mm.

Incheon vs Jeju in September

Incheon is the better pick in September — 76 vs 69 on SeasonMap's comfort score. Incheon is warm, rainy, muggy air, while Jeju is hot, soaked, muggy air.

Incheon vs Jeju — September climate, side by side

	🇰🇷 Incheon	🇰🇷 Jeju
Comfort score	76/100 (B)	69/100 (C)
Feels-like high	28°C	30°C
Avg high / low	26° / 19°	27° / 22°
Rainfall	148 mm	239 mm
Rainy days	9	15
Humidity	80%	81%
Air quality (AQI)	73	62

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

Month by month

Incheon 🇰🇷 South Koreawarm, rainy, muggy air · best May76
Jeju 🇰🇷 South Koreahot, soaked, muggy air · best August69

Incheon vs Jeju in September — FAQ

Is September better in Incheon or Jeju?: Incheon is the better pick in September — 76 vs 69 on SeasonMap's comfort score. Incheon is warm, rainy, muggy air, while Jeju is hot, soaked, muggy air.
What is the weather like in Incheon vs Jeju in September?: In September, Incheon averages 26°C high / 19°C low with about 148 mm of rain; Jeju averages 27°C high / 22°C low with about 239 mm.