I belong to a family of planners. Out comes a fresh Google Doc in October for our Christmas dinner. I wish I was joking. However, it has been handy, as I’ve been able to extend this type of conscientiousness to my wardrobe—especially for events. Right now, I have a weddings in both October November that I need outfits for. That’s only a mere weeks to decide what I’m going to wear.

But I won’t be the only one with a wedding-guest outfit to decide upon⁠—September is one of the biggest months for weddings, and more couples are choosing the less-popular months in order to save money, so it’s fair to assume that you’ll have some dress decisions to make soon too. Also, bonus tip: If you buy your outfit now, chances are by the time the wedding comes around, no one else will be wearing the same.

As I do a lot of shopping for a living, I’ve worked out just what kind of wedding-guest dresses are ideal for autumn and which ones you need to buy now before they sell out. While early September is still warm, the potential for goosebumps increases as we get further into the cooler months. So there are balloon-sleeved frocks (perfect if you don’t want to bring a jacket), as well as metallic dresses that will look incredible under a black blazer and will see you through to the festive period. But if you want to stick to autumn/winter 2019’s biggest dress trend (dark florals!), I’ve selected plenty of those too. Plus, there’s a mix of high street and luxury for every kind of budget.

The ultimate autumn/winter dress. 

Just because it’s getting colder doesn’t mean you can’t choose a bright dress. 

Rixo continues to wow us with beautiful dresses. 

Such an expensive-looking dress. 

Wear with a black headband and gold accessories. 

Take summer’s green dress trend into autumn. 

We’ll call this “sophisticated Barbie.”

A classic autumnal colour. 

Just so beautiful. 

A great option from Topshop. 

Vintage prints are still going strong, and this one from Whistles is a winner. 

Wear this into the festive season by pairing it with tights and ankle boots. 

You might even consider wearing this to work if you layered a black roll-neck underneath. 

If you’ve got a wedding coming up in early September, this one is ideal. 

Pair with strappy sandals or mules. 

If you want a more simple dress, try this silk one from COS. 

This one’s in the sale, and there are still loads of sizes available. 

Okay, it’s a strappy dress, but you can wear it with a blazer and it’ll look incredible (plus, you’ll be warm). 

Red shoes will look great with this dress. 

Another great early September option when the weather is still a bit warmer. 

For when you know the weather might be much colder, you can’t go wrong with a Vampire Wife’s dress. 

This is from one of our new favourite dress brands. 

We’ve seen this all over Instagram, and it’s still a chic option. 

Simple, elegant and inexpensive. 

If you want to find a high street dress that looks expensive, opt for simple colours and a satin finish.

The contrasting colours is what makes this dress extra special. 

Save this one for the festive period. 

Up close, this dress looks super expensive. 

Who can turn down sequins? 

Pair this with purple heels for a chic monochromatic look. 

To make jaw drops (although not upstage the bride), choose this gorgeous green gown. 

Self-Portrait wins again with this sequinned beauty.

Wear this dress right through to the Christmas period. You can even wear this during the day, if you fancy, by throwing over an oversized chunky knit and a pair of black biker boots. 

Who can resist velvet as the nights get darker and colder? 

Those ruffles hide any third helpings of the buffet but look great when you dance. 

This dress is nearly sold out, so snap it up sharpish.

Such a fun colour. 

Romantic floral dresses are just the best for autumnal nuptials.

Pair with chunky velvet platforms.

This brand is one we can’t get out of our heads. 

Next up, the biggest autumn/winter 2019 trends you need to know. 

This piece was published at an earlier date and has since been updated.