What is the weather like in Amsterdam vs Brussels in September?

In September, Amsterdam averages 20°C high / 12°C low with about 93 mm of rain; Brussels averages 21°C high / 12°C low with about 63 mm.

Amsterdam vs Brussels in September

Brussels is the better pick in September — 86 vs 82 on SeasonMap's comfort score. Brussels is nice, a little rain, clean air, while Amsterdam is nice, rainy, clean air.

Amsterdam vs Brussels — September climate, side by side

	🇳🇱 Amsterdam	🇧🇪 Brussels
Comfort score	82/100 (A)	86/100 (A)
Feels-like high	19°C	20°C
Avg high / low	20° / 12°	21° / 12°
Rainfall	93 mm	63 mm
Rainy days	11	11
Humidity	79%	76%
Air quality (AQI)	49	45

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

Month by month

Amsterdam vs Brussels in September — FAQ

Is September better in Amsterdam or Brussels?: Brussels is the better pick in September — 86 vs 82 on SeasonMap's comfort score. Brussels is nice, a little rain, clean air, while Amsterdam is nice, rainy, clean air.
What is the weather like in Amsterdam vs Brussels in September?: In September, Amsterdam averages 20°C high / 12°C low with about 93 mm of rain; Brussels averages 21°C high / 12°C low with about 63 mm.