Seattle vs Vancouver: which is better, month by month

Seattle beats Vancouver in 8 of 12 months — its lead peaks in December (49 vs 40) — and they are within 3 points in May to August.

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.

Seattle

🇺🇸 United States · mild climate

Best month: July 97/100
Months won: 8 of 12

Vancouver

🇨🇦 Canada · mild climate

Best month: July 97/100
Months won: 0 of 12

Seattle vs Vancouver — all 12 months

Month	Seattle	Vancouver	Winner	Gap
January	52Dcold, rainy, clean air	44Fcold, soaked, clean air	Seattle	8
February	58Dcold, rainy, clean air	54Dcold, rainy, clean air	Seattle	4
March	67Ccold, a little rain, clean air	62Ccold, rainy, clean air	Seattle	5
April	77Bcool, a little rain, clean air	73Bcool, rainy, clean air	Seattle	4
May	85Anice, a little rain, clean air	84Anice, a little rain, clean air	Tie	1
June	92Snice, dry, clean air	89Anice, a little rain, clean air	Tie	3
July	97Swarm, dry, clean air	97Swarm, dry, clean air	Tie	0
August	95Swarm, dry, clean air	94Swarm, dry	Tie	1
September	89Anice, a little rain, clean air	82Anice, a little rain, clean air	Seattle	7
October	72Bcool, a little rain, clean air	65Ccool, rainy, clean air	Seattle	7
November	57Dcold, rainy, clean air	49Fcold, soaked, clean air	Seattle	8
December	49Fcold, rainy, clean air	40Fcold, soaked, clean air	Seattle	9

A month is a tie when the two are within 3 points. The widest gap is December (49 vs 40). Tap a month for that month's temperature, rain, humidity and air quality side by side.