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

In September, Dublin averages 18°C high / 10°C low with about 79 mm of rain; Saint Helier averages 20°C high / 14°C low with about 77 mm.

Dublin vs Saint Helier in September

Dublin and Saint Helier are nearly tied in September — 80 vs 83 on SeasonMap's comfort score. Dublin is nice, a little rain, clean air; Saint Helier is nice, a little rain, clean air.

Dublin vs Saint Helier — September climate, side by side

	🇮🇪 Dublin	Saint Helier
Comfort score	80/100 (A)	83/100 (A)
Feels-like high	16°C	19°C
Avg high / low	18° / 10°	20° / 14°
Rainfall	79 mm	77 mm
Rainy days	13	11
Humidity	81%	79%
Air quality (AQI)	36	43

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

Month by month

Dublin vs Saint Helier in September — FAQ

Is September better in Dublin or Saint Helier?: Dublin and Saint Helier are nearly tied in September — 80 vs 83 on SeasonMap's comfort score. Dublin is nice, a little rain, clean air; Saint Helier is nice, a little rain, clean air.
What is the weather like in Dublin vs Saint Helier in September?: In September, Dublin averages 18°C high / 10°C low with about 79 mm of rain; Saint Helier averages 20°C high / 14°C low with about 77 mm.