Fall in the Colorado mountains is gorgeous. It is also completely incapable of making up its mind.

A fall weekend up here can hand you a sunny afternoon that feels like September and a snowy morning that feels like January. Sometimes on the same day.

So the real question isn’t “What’s the weather going to be?” It’s “How many seasons do I need to pack for?”

Pack layers, one outfit for dinner, boots with real traction, and less than you think. That’s the short answer. Here’s the long one.

Packing List at a Glance

• A thin thermal layer (yes, already)
• 2 or 3 cozy tops or sweaters that layer easily
• Jeans plus one “nicer” pant, like corduroy or faux suede
• One sweater dress and thermal-lined tights for dinner
• A warm coat and one lighter jacket
• Boots that can handle ice
• A hat, sunglasses, sunscreen and ChapStick

Fall in the Mountains Can’t Make Up Its Mind

The biggest packing mistake is checking the Denver forecast and assuming that’s what you’ll get in the mountains.

It’s not. Mountain towns can be doing something completely different, so check the forecast for exactly where you’re staying. If you’re road-tripping, check every stop.

I’ve told you before about leaving a freezing Evergreen and finding Winter Park somehow eight degrees warmer. I still don’t understand it. Colorado apparently doesn’t owe me an explanation.

And by late fall, snow can show up any time. A crisp, sunny afternoon can turn into a wet, snowy morning before you’ve finished your coffee.

Build Every Outfit in Layers

You already know what I’m going to say. Layering is life in Colorado.

Start with a thin thermal layer, add the cute layer you actually want people to see, then a jacket you can take off when the sun comes out and put right back on when it drops behind the mountains.

The goal is warm without looking like you packed for an expedition to the North Pole.

What to Pack

For Walking Around a Mountain Town

Jeans, a cozy sweater or cardigan, warm socks and boots with good traction. A soft knit cardigan like this cream and gold one is easy to throw on and pull off all day long.

Then add a hat. A wool felt hat keeps the sun off your face, hides second-day hair and makes jeans and a sweater look like an actual outfit.

For a Cute Dinner

Pack one sweater dress. Just one. Add thermal-lined tights and boots, and you have a dinner outfit that survives the walk from the car.

This brown sweater midi dress has long blouson sleeves and a swingy skirt, and it looks like you tried much harder than you did.

For Something Besides Jeans

If you want one “nicer” pair of pants, faux suede flares or wide-leg corduroy look polished at dinner but still feel cozy on a chilly walk.

Add a romantic ruffle blouse and a cardigan, and you’re done.

Your Jackets

Bring two: a real coat for cold mornings and nights, and a lighter layer for sunny afternoons. A faux suede sherpa-lined coat handles the cold, and a denim jacket with crochet sleeves is perfect for the afternoon when the sun decides to show off.

And if you’re driving, keep an extra layer in the car. Someone in your backseat will insist it’s not cold right up until it is.

The Small Stuff That Earns Its Spot

• Sunglasses and sunscreen. The mountain sun is intense, even when it’s cold.
• ChapStick. It is dry up here. Pack two. You’ll lose one.
• A bag big enough for the layers you’ll shed by lunch. A slouchy suede hobo bag holds a surprising amount.
• A little turquoise. A leather cuff and some turquoise earrings make the same jeans and sweater feel like a brand-new outfit.

What to Leave at Home

• Shoes with no traction. Fall ice is real, and smooth-bottomed boots turn into tiny fashionable skis.
• One giant sweater with nothing underneath. Too hot inside, too cold outside, and no way to fix it.
• The “just in case” outfits. Pick pieces that mix with each other and leave the rest at home.

So, What Should You Pack?

Layers. One dinner outfit. Boots that won’t send you sliding. A hat, sunglasses and more ChapStick than seems reasonable.

Check the forecast for where you’re actually going, not Denver. Then pack for at least two seasons.

Coming back once it really gets cold? Here’s what I wear in a Colorado winter.

And remember: that beautiful mountain sunshine is still lying to you.