What is the weather like in London vs Saint Helier in September?

In September, London averages 21°C high / 12°C low with about 56 mm of rain; Saint Helier averages 20°C high / 14°C low with about 77 mm.

London vs Saint Helier in September

London and Saint Helier are nearly tied in September — 84 vs 83 on SeasonMap's comfort score. London is nice, a little rain, clean air; Saint Helier is nice, a little rain, clean air.

London vs Saint Helier — September climate, side by side

	🇬🇧 London	Saint Helier
Comfort score	84/100 (A)	83/100 (A)
Feels-like high	19°C	19°C
Avg high / low	21° / 12°	20° / 14°
Rainfall	56 mm	77 mm
Rainy days	11	11
Humidity	78%	79%
Air quality (AQI)	46	43

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

Month by month

London vs Saint Helier in September — FAQ

Is September better in London or Saint Helier?: London and Saint Helier are nearly tied in September — 84 vs 83 on SeasonMap's comfort score. London is nice, a little rain, clean air; Saint Helier is nice, a little rain, clean air.
What is the weather like in London vs Saint Helier in September?: In September, London averages 21°C high / 12°C low with about 56 mm of rain; Saint Helier averages 20°C high / 14°C low with about 77 mm.