Incheon vs Jeju: which is better, month by month

Incheon beats Jeju in 6 of 12 months — its lead peaks in April (81 vs 71) — while Jeju wins January, July, August and December; they are within 3 points in February and November.

Each place is scored under the lens that suits its type — they are different kinds of destination, so the scores are each place at its own best. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.

Incheon

🇰🇷 South Korea · mild climate

Best month: May 88/100
Months won: 6 of 12

Jeju

🇰🇷 South Korea · mild climate

Best month: August 82/100
Months won: 4 of 12

Incheon vs Jeju — all 12 months

Month	Incheon	Jeju	Winner	Gap
January	46Ffreezing, dry	50Dcold, a little rain	Jeju	4
February	54Dfreezing, dry	54Dcold, a little rain	Tie	0
March	72Bcold, a little rain	64Ccool, rainy	Incheon	8
April	81Acool, a little rain	71Bnice, rainy, muggy air	Incheon	10
May	88Anice, rainy, muggy air	79Bwarm, rainy, muggy air	Incheon	9
June	82Awarm, rainy, muggy air	75Bhot, soaked, muggy air	Incheon	7
July	58Dhot, soaked, muggy air	77Bsweltering, soaked, muggy air	Jeju	19
August	56Dsweltering, soaked, muggy air	82Asweltering, rainy, muggy air	Jeju	26
September	76Bwarm, rainy, muggy air	69Chot, soaked, muggy air	Incheon	7
October	84Anice, a little rain	78Bnice, rainy, clean air	Incheon	6
November	70Bcold, a little rain	68Ccool, rainy, clean air	Tie	2
December	51Dfreezing, dry	57Dcold, a little rain, clean air	Jeju	6

A month is a tie when the two are within 3 points. The widest gap is August (56 vs 82). Tap a month for that month's temperature, rain, humidity and air quality side by side.