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Brussels - weather in mid-September

Weather data I have gleaned for Brussels at the start of September

Average high 20C/68F
Average low 10C/50F
Average rainfall in September 3.5 inches

On paper that's very similar to where I live (Boston). About 5F cooler in Brussels and slightly wetter.

The averages only paint part of the picture, though, as we all know.

So I ask - what's it really like? Is the weather very changeable during a single day? When it rains is it soft rain or RAIN!! rain? Windy? If you've been to Brussels (or Bruges, Ghent or Antwerp in mid-September, what did you experience?

We will be headed to Islay after Belgium, which is very likely to be cooler and very changeable hour-by-hour. I'm making packing lists now and hoping that the layers + waterproof gear we need for Islay will serve us in Belgian urban areas.

Posted by
1766 posts

September is often a good month - not too different from August.

If it rains it might be a quick shower, or it might be a thunderstorm. Or it might not rain at all. Who knows?

Could be hot and sunny….

Could be anything….

Posted by
12040 posts

Over all, usually very comfortable weather. Don't worry about it.

Posted by
504 posts

Yes, it should be nice. But be prepared for rain.

Posted by
240 posts

I am also going to be in Belgium at the same time. Would wearing khakis and Nike's for ladies be good? Or could I get by with skinny jeans and a t-shirt. Any help for what to wear would be great. Can men wear shorts?.

Posted by
565 posts

Most days last September were pleasant, with intermittent rain. Mid-to-upper 60s seemed to be the norm.

I did experience a few miserable days where it rained nearly all day, the sun didn't come out, and it never made it to 60, but that was just maybe 2-3 days out of 13.

Take a light jacket/hoodie, and then you can just tie it around your waist in the afternoons.