Boston vs St. John's, Newfoundland: which is better, month by month

Boston beats St. John's, Newfoundland in 10 of 12 months — its lead peaks in May (86 vs 71) — while St. John's, Newfoundland wins July 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.

Boston

🇺🇸 United States · mild climate

Best month: September 90/100
Months won: 10 of 12

St. John's, Newfoundland

🇨🇦 Canada · mild climate

Best month: July 90/100
Months won: 2 of 12

Boston vs St. John's, Newfoundland — all 12 months

Month	Boston	St. John's, Newfoundland	Winner	Gap
January	41Ffreezing, rainy, clean air	33Ffreezing, rainy, clean air	Boston	8
February	51Dcold, a little rain, clean air	38Ffreezing, rainy, clean air	Boston	13
March	59Dcold, rainy, clean air	46Ffreezing, rainy, clean air	Boston	13
April	70Bcool, rainy, clean air	59Dcold, rainy, clean air	Boston	11
May	86Anice, a little rain, clean air	71Bcold, a little rain, clean air	Boston	15
June	89Awarm, a little rain	80Anice, rainy, clean air	Boston	9
July	76Bhot, rainy	90Snice, rainy, clean air	St. John's, Newfoundland	14
August	80Ahot, rainy	88Anice, a little rain, clean air	St. John's, Newfoundland	8
September	90Swarm, rainy, clean air	77Bnice, rainy, clean air	Boston	13
October	74Bnice, rainy, clean air	66Ccool, rainy, clean air	Boston	8
November	63Ccold, rainy, clean air	51Dcold, rainy, clean air	Boston	12
December	46Fcold, rainy, clean air	36Ffreezing, rainy, clean air	Boston	10

A month is a tie when the two are within 3 points. The widest gap is May (86 vs 71). Tap a month for that month's temperature, rain, humidity and air quality side by side.