Hong Kong vs San Francisco: which is better, month by month

San Francisco beats Hong Kong in 7 of 12 months — its lead peaks in August (95 vs 38) — while Hong Kong wins December to March; they are within 3 points in November.

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.

Hong Kong

🇭🇰 Hong Kong · mild climate

Best month: December 89/100
Months won: 4 of 12

San Francisco

🇺🇸 United States · mild climate

Best month: September 96/100
Months won: 7 of 12

Hong Kong vs San Francisco — all 12 months

Month	Hong Kong	San Francisco	Winner	Gap
January	84Anice, a little rain, poor air quality	68Ccool, rainy, clean air	Hong Kong	16
February	86Anice, a little rain, muggy air	75Bcool, rainy, muggy air	Hong Kong	11
March	80Awarm, a little rain, muggy air	76Bcool, rainy, clean air	Hong Kong	4
April	71Bhot, rainy, muggy air	85Anice, a little rain, clean air	San Francisco	14
May	55Dhot, soaked, muggy air	88Anice, dry, clean air	San Francisco	33
June	40Fsweltering, soaked, muggy air	92Snice, dry, clean air	San Francisco	52
July	50Dsweltering, soaked, muggy air	93Snice, dry, clean air	San Francisco	43
August	38Fsweltering, soaked, muggy air	95Snice, dry, clean air	San Francisco	57
September	47Fsweltering, soaked, muggy air	96Snice, dry, clean air	San Francisco	49
October	65Chot, soaked, muggy air	90Snice, dry, clean air	San Francisco	25
November	78Bwarm, a little rain	80Anice, a little rain, clean air	Tie	2
December	89Anice, dry, poor air quality	67Ccool, rainy, clean air	Hong Kong	22

A month is a tie when the two are within 3 points. The widest gap is August (38 vs 95). Tap a month for that month's temperature, rain, humidity and air quality side by side.