Hammock Temperature Guide

By topquilt.com · Updated Oct 21, 2026 · 6 min read

The most common question from new hammock campers is "what do I need for this weekend's temperatures?" This hammock temperature guide answers it for every range, from muggy summer nights to deep winter. It assumes an average sleeper, a reasonably sheltered site and decent sleep clothing. Use it as a starting point, then adjust for how warm or cold you sleep.

The master table: insulation by temperature

Ratings are manufacturer ratings. Cold sleepers should shift one row colder; warm sleepers can often shift one row warmer.

How to use this guide

1. Find the coldest expected low for your trip, not the average. Check forecasts for the nearest higher-elevation point, since temperatures drop roughly 3-5°F per 1,000 feet of elevation gain.
2. Read across the row for top, bottom and extras.
3. Adjust for you. If you're often cold in bed, go one row colder. If you run hot, one row warmer.
4. Adjust for wind. On exposed or breezy sites, go one row colder or add wind protection.
5. Adjust for humidity. Damp, cool nights feel colder than dry ones at the same temperature, and moisture reduces loft over multi-day trips.

Why temperature ratings need context

Most hammock top quilts and underquilts are rated by the manufacturer rather than tested to a standard like ISO 23537. Methods vary: some brands calculate ratings from loft, others rely on field experience. Cottage makers often rate closer to the lower limit, where an average sleeper wearing some clothing is OK but not toasty. Budget brands are sometimes optimistic. Our underquilt temperature ratings guide covers the underquilt side in detail.

That's why this guide includes margin and why personal adjustment matters. Our top quilt temperature ratings page explains the details, and the quilt temperature calculator helps estimate what rating you need.

Range by range

Summer: above 60°F

Many first-time hammock campers are surprised to feel chilly on a 65°F night. That's air moving under the hammock. A light underquilt (40-50°F) or a thin pad fixes it. On top, a light quilt or blanket is plenty; a quilt with an unzippable footbox doubles as a blanket. See best summer quilts and best 40-degree quilts.

Three-season: 35-60°F

This is the core range for most backpackers. A 30°F top quilt and 30°F underquilt cover much of it, and a 20°F pair gives margin for the colder end and shoulder seasons. A beanie and light puffy extend either. See best 30-degree quilts.

Shoulder season: 20-35°F

Wind protection starts mattering a lot. Use a 20°F top quilt and an underquilt rated 10-20°F. Pitch the tarp low, consider doors and an underquilt protector, and bring proper sleep layers. A top cover can make the difference between a cold and comfortable night. See best 20-degree quilts and top covers and hammock socks.

Winter: below 20°F

Full-length underquilts only, baffled top quilts with draft collars, full wind protection and a foam pad as backup. Our winter hammock camping guide covers everything specific to this range, and best winter top quilts lists options.

The "one quilt set" question

If you can only own one top quilt and one underquilt, what should they be? For most hikers in the US:

• Southeast, low elevations: 30°F pair; add clothing for cold snaps.
• Most of the US, three-season: 20°F pair. This is the most popular choice and handles spring through fall in most mountains.
• Mountain West, high elevations, shoulder seasons: 10-20°F pair.
• Frequent winter use: a 20°F pair plus layering options, or a dedicated winter set.

A 20°F system is warm enough to vent in summer, especially with an unzippable footbox, and can be stretched into the high teens with clothing and a top cover. See best hammock top quilts and best underquilts for options.

Extending a quilt's range

You don't need a new quilt for every 10°F. Ways to stretch a system colder:

• Sleep clothing: a down jacket, insulated pants, hat and booties can add several degrees. See sleep clothing.
• Top cover or sock: blocks wind and traps a warm air layer.
• Foam pad on top of the underquilt: adds bottom warmth.
• Layered quilts: a summer quilt over a three-season quilt. See quilt layering system.
• Good habits: eat, warm up before bed, stay dry. See how to stay warm in a quilt.

And to stretch it warmer: vent, open the footbox, stick a leg out, or sleep on top of the top quilt with just a liner.

Pad R-values for hammock use

If you use a sleeping pad instead of an underquilt, these R-values are rough starting points. Pads perform a little worse in hammocks than on the ground because they don't wrap your shoulders and can shift.

More on pads in sleeping pad in a hammock and sleeping pad R-value for quilts.

Other factors that change the numbers

Temperature is only one input. These conditions can make the same insulation feel warmer or colder than the table suggests.

Wind

Wind is the biggest variable for hammock campers because it strips heat from both the top quilt and the underquilt. A steady breeze can make a system rated for the air temperature feel inadequate. Pitch the tarp low on the windward side, choose sheltered sites, and add a top cover or hammock sock when wind is forecast. See top covers and hammock socks.

Humidity and dew

Damp air conducts heat better than dry air, and dew settling on shells slowly reduces loft. Humid nights near rivers and lakes often feel colder than dry desert nights at the same temperature.

Elevation and terrain

Cold air sinks. On clear, still nights, valley bottoms and stream hollows can be several degrees colder than a nearby bench or slope. Higher elevations are colder overall.

Your body

Metabolism, body size, fatigue, hydration and what you ate all affect how warm you sleep. Many people sleep colder after a hard day, at altitude, or when underfed. Women, on average, report sleeping colder than men in similar gear, which is one reason some brands publish different comfort guidance. If in doubt, carry more margin. Our page on quilts for cold sleepers goes deeper.

Fit and technique

An underquilt with a gap or a top quilt left open at the neck performs far below its rating. Technique is often worth more than 10°F of extra down. See how to hang an underquilt and how to use a top quilt in a hammock.

Warm sleepers: when to go lighter

If you consistently find yourself venting and kicking off your quilt at night, you can likely shift one row warmer in the table and save weight. Warm sleepers often get by with a 30°F top quilt into the low 30s, especially with a hat and light puffy. Keep the underquilt conservative, though: even warm sleepers feel convective cooling underneath, and a cold back is harder to fix mid-night than a warm chest.

When you're still cold

If you followed the table and still got cold, figure out where. Cold underneath means the underquilt is underrated, poorly fitted or hit by wind; see cold butt syndrome. Cold on top means drafts at the shoulders, a too-short quilt, or a rating that's optimistic for you; see why am I cold in my quilt. For the bigger picture, read the hammock insulation guide.