Cardiff vs London: which is better, month by month

London beats Cardiff in 6 of 12 months — its lead peaks in September (84 vs 79) — and they are within 3 points in the other 6 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.

Cardiff

🇬🇧 United Kingdom · mild climate

Best month: July 91/100
Months won: 0 of 12

London

🇬🇧 United Kingdom · mild climate

Best month: July 94/100
Months won: 6 of 12

Cardiff vs London — all 12 months

Month	Cardiff	London	Winner	Gap
January	54Dcold, rainy, clean air	54Dcold, a little rain, clean air	Tie	0
February	59Dcold, rainy, clean air	63Ccold, a little rain, clean air	London	4
March	65Ccold, rainy, clean air	69Ccold, a little rain, clean air	London	4
April	76Bcool, a little rain, clean air	79Bcool, a little rain, clean air	Tie	3
May	83Acool, a little rain, clean air	86Anice, a little rain, clean air	Tie	3
June	88Anice, a little rain, clean air	91Snice, a little rain, clean air	Tie	3
July	91Snice, a little rain, clean air	94Swarm, a little rain, clean air	Tie	3
August	89Anice, a little rain, clean air	93Snice, a little rain, clean air	London	4
September	79Bnice, rainy, clean air	84Anice, a little rain, clean air	London	5
October	68Ccool, rainy, clean air	73Bcool, a little rain, clean air	London	5
November	58Dcold, rainy, clean air	61Ccold, a little rain, clean air	Tie	3
December	51Dcold, rainy, clean air	56Dcold, a little rain, clean air	London	5

A month is a tie when the two are within 3 points. The widest gap is September (79 vs 84). Tap a month for that month's temperature, rain, humidity and air quality side by side.