Chiang Mai vs Vientiane: which is better, month by month

Chiang Mai beats Vientiane in 4 of 12 months — its lead peaks in June (60 vs 47) — while Vientiane wins March; they are within 3 points in the other 7 months.

Each place is scored under the lens that suits its type. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.

Chiang Mai

🇹🇭 Thailand · tropical climate

Best month: January 87/100
Months won: 4 of 12

Vientiane

🇱🇦 Laos · tropical climate

Best month: December 87/100
Months won: 1 of 12

Chiang Mai vs Vientiane — all 12 months

Month	Chiang Mai	Vientiane	Winner	Gap
January	87Ahot, dry	86Ahot, dry	Tie	1
February	82Asweltering, dry	81Asweltering, dry	Tie	1
March	65Csweltering, dry	70Bsweltering, dry	Vientiane	5
April	54Dsweltering, dry	56Dsweltering, a little rain, poor air quality	Tie	2
May	52Dsweltering, rainy	50Dsweltering, soaked	Tie	2
June	60Csweltering, rainy, clean air	47Fsweltering, soaked, clean air	Chiang Mai	13
July	53Dsweltering, soaked, clean air	40Fsweltering, soaked, clean air	Chiang Mai	13
August	46Fsweltering, soaked, clean air	38Fsweltering, soaked, clean air	Chiang Mai	8
September	49Fsweltering, soaked, muggy air	43Fsweltering, soaked, clean air	Chiang Mai	6
October	61Csweltering, soaked, muggy air	64Csweltering, rainy, clean air	Tie	3
November	74Bsweltering, a little rain, muggy air	75Bsweltering, dry	Tie	1
December	84Ahot, dry	87Ahot, dry	Tie	3

A month is a tie when the two are within 3 points. The widest gap is June (60 vs 47). Tap a month for that month's temperature, rain, humidity and air quality side by side.