What is the weather like in Cardiff vs London in September?

In September, Cardiff averages 19°C high / 12°C low with about 106 mm of rain; London averages 21°C high / 12°C low with about 56 mm.

Cardiff vs London in September

London is the better pick in September — 84 vs 79 on SeasonMap's comfort score. London is nice, a little rain, clean air, while Cardiff is nice, rainy, clean air.

Cardiff vs London — September climate, side by side

	🇬🇧 Cardiff	🇬🇧 London
Comfort score	79/100 (B)	84/100 (A)
Feels-like high	17°C	19°C
Avg high / low	19° / 12°	21° / 12°
Rainfall	106 mm	56 mm
Rainy days	13	11
Humidity	82%	78%
Air quality (AQI)	38	46

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Cardiff 🇬🇧 United Kingdomnice, rainy, clean air · best July79
London 🇬🇧 United Kingdomnice, a little rain, clean air · best July84

Cardiff vs London in September — FAQ

Is September better in Cardiff or London?: London is the better pick in September — 84 vs 79 on SeasonMap's comfort score. London is nice, a little rain, clean air, while Cardiff is nice, rainy, clean air.
What is the weather like in Cardiff vs London in September?: In September, Cardiff averages 19°C high / 12°C low with about 106 mm of rain; London averages 21°C high / 12°C low with about 56 mm.