What to Wear Hiking in Fall: A Simple Layering Guide (35°F to 65°F)

Fall is the best hiking season in much of the US and Canada: cooler air, fewer bugs, thinner crowds and trees that look like they are on fire. It is also the season when hikers get caught out most often. A trailhead can be 38°F (3°C) at 8 a.m. and 65°F (18°C) by lunch, then drop fast once the sun goes behind a ridge. The answer is not one big warm jacket. It is a few thin layers you can add and remove all day.

This guide explains what to wear hiking in fall, layer by layer, with simple outfits for different temperatures and the mistakes that make cool-weather hikes miserable.

Why layering works better than one warm jacket

When you climb, your body makes a lot of heat and you sweat, even when it is cold. When you stop for a snack or reach a windy summit, that heat disappears and the sweat in your clothes starts pulling warmth away from your skin. One heavy coat is too hot on the climb and not flexible enough at the top.

Layers let you match your clothing to what you are doing right now. Most hikers use three:

• Base layer: next to your skin. Its job is to move sweat away and dry fast.
• Mid layer: insulation. Its job is to trap warm air.
• Outer layer (shell): protection. Its job is to block wind and rain.

On a mild fall day you might wear only the base layer while moving and carry the other two. On a cold, wet day you may wear all three.

Skip cotton, especially in fall

Cotton t-shirts, hoodies and jeans soak up sweat and rain and stay wet for a long time. Wet clothing pulls heat from your body much faster than dry clothing, and that is how cool, damp fall days turn into dangerous ones. The National Park Service specifically warns hikers to avoid cotton and jeans for this reason.

Choose merino wool or synthetic fabrics (polyester, nylon) instead. Both still feel warm when damp and dry much faster than cotton.

Layer 1: the base layer

For fall, a lightweight long-sleeve top in merino or polyester is the most useful piece you can own. Long sleeves help on chilly mornings and also protect you from the sun, which is still strong on open ridges and at altitude. A quarter-zip is handy because you can open it on climbs to dump heat without stopping.

For your legs, quick-dry hiking pants are enough for most fall days. On cold mornings below about 40°F (4°C), thin base-layer leggings under your pants make a big difference.

Layer 2: the mid layer

Your mid layer is the warm piece you put on at breaks, at the summit and on cold starts. Two common choices:

• Fleece: breathable, warm when damp, tough and inexpensive. Great for cool, active days. A soft-shell fleece also cuts some wind.
• Light puffy jacket (down or synthetic): warmer for its weight and packs smaller, but it is less breathable for hiking hard in, and down loses much of its warmth when soaked.

For most fall day hikes, a fleece is the simplest choice. Our Polar Fleece Soft-Shell Jacket for men and for women are built for exactly this job: warm at a windy viewpoint, and a mid layer under a shell when the weather turns.

Layer 3: the outer layer

Wind is what makes 50°F (10°C) feel like 35°F (2°C). A light wind jacket weighs very little, packs into a pocket and makes your fleece far more effective on exposed ridges. The Packable UPF 50+ Windbreaker folds into its own pouch, so it can live in your pack all season.

A wind jacket is not a rain jacket. If the forecast shows rain, or you are heading into the mountains where storms build quickly, also carry a fully waterproof rain jacket. Staying dry is the single most important thing in cool weather.

Hands, head, neck and feet

Small items make the biggest difference for their weight in fall:

• Warm hat or beanie: easy to put on and take off as you warm up and cool down.
• Light gloves: cold fingers make it hard to open snacks, use your phone or adjust gear.
• Neck gaiter or buff: blocks wind on your neck and can be pulled up over your ears.
• Wool hiking socks: wet, cold feet ruin a hike fast. Merino wool hiking socks stay warm even when damp. Pack a spare pair on wet or long hikes.
• Footwear: fall trails are covered in wet leaves that hide roots and rocks. Use shoes or boots with good grip. Waterproof footwear helps on muddy or snowy trails.

What to wear hiking by temperature

Everyone runs warm or cold differently, so use these as starting points. Always check the forecast for the trail itself, not just the nearest town. Temperatures usually drop as you gain elevation, and summits are often much windier.

55 to 65°F (13 to 18°C)

• Synthetic or merino t-shirt or light long-sleeve
• Hiking pants or shorts
• In your pack: fleece and wind jacket

45 to 55°F (7 to 13°C)

• Long-sleeve base layer
• Hiking pants
• Fleece on at the start, off once you warm up
• In your pack: wind jacket, hat, light gloves

35 to 45°F (2 to 7°C)

• Long-sleeve base layer, plus leggings under pants if you run cold
• Fleece mid layer
• Wind or rain shell
• Hat, gloves, neck gaiter, wool socks
• In your pack: a warmer layer such as a puffy jacket for breaks

Below 35°F (2°C)

Now you are close to winter hiking. Wear all three layers, carry an extra insulating jacket, warm gloves and a spare hat, and check for snow and ice. Higher trails can see snow and ice from October onward, so ask the park or ranger station about conditions and whether you need traction devices.

Start cool, not warm

An old hiking rule is "be bold, start cold." If you feel comfortable standing at the trailhead, you will probably be sweating within ten minutes of climbing. Start slightly chilly, with your fleece in your pack. Take a layer off before you start sweating heavily, and put one on as soon as you stop, before you get cold. Small, early adjustments keep your clothes dry, and dry clothes keep you warm.

Common fall hiking clothing mistakes

• Wearing cotton. A cotton hoodie feels cozy at the car and wet and cold an hour later.
• Leaving the jacket in the car because the morning looks sunny. Fall weather changes quickly, especially in the mountains.
• Bringing a pack too small for your layers. You need room to stash the fleece and jacket you take off.
• Forgetting how early it gets dark. Days are much shorter in fall. Plan to finish well before sunset and always carry a headlamp.
• Skipping sun protection. Cool air does not mean weak sun. Bring sunglasses and sunscreen.

Bright colors and hunting season

Fall is hunting season in many areas of the US and Canada, including some public lands where hiking is allowed. Wearing a bright color, such as a blaze orange hat or vest, makes you easier to see. Rules and seasons vary by state, province and park, so check with the land manager before you go.

Know the early signs of getting too cold

Hypothermia does not require freezing temperatures. It can happen on cool days, especially when you are wet, tired and in the wind. Early signs include strong shivering, clumsy hands, stumbling, slurred speech and confusion. If you or a hiking partner notice these, get out of the wind, change into dry layers, add insulation, eat something and drink something warm if you have it. If symptoms are serious or do not improve, get medical help immediately. Carrying a spare dry layer and an emergency blanket or bivy is cheap insurance.

The short version

For fall hiking, wear a quick-dry base layer, carry a fleece and a wind or rain shell, and add a hat, gloves and wool socks as it gets colder. Avoid cotton, start a little cool, and adjust your layers early. With the right layers in your pack, the coldest part of a fall hike becomes the view from the top, not the walk back down.