Horse Blankets: When and How to Use Them Properly

Learn when your horse needs a blanket, how to choose the right weight, proper fitting tips, and common blanketing mistakes to avoid.

8 min read

The Blanketing Question Every Horse Owner Faces

Few topics in the equine world spark as much debate as horse blanketing. Some owners blanket at the first sign of a cool breeze, while others believe horses should never wear blankets because nature gave them a perfectly good winter coat. The truth, as usual, sits somewhere in the middle and depends entirely on your individual horse's situation.

I've gone back and forth on blanketing over the years, and here's what I've learned: there's no single right answer that applies to every horse. A clipped show horse in New England has vastly different needs than an unclipped mustang in Montana. What matters is understanding the factors that determine whether your specific horse needs a blanket, and if so, what kind and when.

How Horses Naturally Handle Cold Weather

Before we talk about blankets, let's appreciate just how well-designed horses are for dealing with temperature extremes. Horses are remarkably cold-adapted animals with several natural thermoregulation mechanisms:

Winter coat: Horses grow a thick winter coat starting in fall, triggered by decreasing daylight hours. The hairs stand up (piloerection) to trap warm air against the skin, creating an insulating layer similar to how a down jacket works
Body mass: A horse's large body mass produces significant metabolic heat, especially during hay digestion. Hindgut fermentation of forage generates substantial internal warmth
Fat layer: Horses in good condition enter winter with a subcutaneous fat layer that provides insulation and energy reserves
Behavioral adaptation: Horses will turn their hindquarters to wind, seek shelter behind trees or buildings, and huddle together in groups to conserve warmth

A healthy, unclipped horse with a full winter coat and adequate forage can comfortably handle temperatures well below freezing, often down to 0 degrees Fahrenheit or lower depending on the breed. Their lower critical temperature (the point where they need to expend extra energy to stay warm) is around 30 to 40 degrees Fahrenheit for a summer-coated horse and as low as 0 degrees Fahrenheit for a horse in full winter coat.

When Your Horse Actually Needs a Blanket

Despite those impressive natural abilities, there are legitimate situations where blanketing is the right call:

Clipped Horses

If you body clip your horse for winter riding (to prevent excessive sweating and long cool-down times), you've removed their primary insulation. A clipped horse absolutely needs blanketing in cold weather. The heavier the clip, the more warmth the blanket needs to provide.

Senior Horses

Older horses often have difficulty maintaining body weight and may not grow as thick a winter coat. If your senior horse is losing weight despite adequate feed, a blanket reduces the caloric expenditure needed to stay warm and helps them maintain condition through winter.

Sick or Underweight Horses

Horses recovering from illness or in poor body condition lack the fat reserves and metabolic efficiency to thermoregulate effectively. Blanketing supports their recovery by reducing the energy demanded for heat production.

Horses New to Cold Climates

A horse that's spent its entire life in Florida and moves to Minnesota in November hasn't had time to acclimate or grow an appropriate winter coat. These horses benefit from blanketing during their first winter in a colder climate.

Wet and Windy Conditions

A dry horse in calm air handles cold remarkably well. But add rain and wind, and everything changes. Wet fur loses its insulating ability almost entirely. A waterproof turnout sheet or blanket during cold rain is often more important than a heavy blanket during dry cold. If your horse doesn't have access to shelter during wet weather, a waterproof layer is essential.

Horses Without Adequate Shelter

Horses with access to a three-sided run-in shed or barn can escape wind and precipitation. If your horse lives in a pasture without any shelter, blanketing becomes more necessary during harsh weather because they can't escape the elements.

Choosing the Right Blanket Weight

Horse blankets come in various weights measured in grams of fill. Understanding these categories helps you match the blanket to the conditions:

Sheets (0 grams of fill)

Lightweight, no insulation. Used for rain protection, fly protection, or as a wind barrier. Waterproof turnout sheets are incredibly useful during cool, rainy fall weather when temperatures aren't truly cold but moisture is the issue.

Lightweight Blankets (100 to 150 grams)

A thin layer of insulation suitable for cool weather in the 40 to 50 degree Fahrenheit range for clipped horses, or 20 to 30 degrees for horses with a full coat who just need a little extra warmth.

Medium Weight Blankets (200 to 300 grams)

The most versatile option and the blanket most owners use most frequently. Appropriate for temperatures in the 20 to 40 degree Fahrenheit range for clipped horses, or teens and below for horses with partial coats.

Heavy Weight Blankets (350 to 400+ grams)

Maximum insulation for severely cold conditions. Reserved for fully clipped horses in temperatures below 20 degrees Fahrenheit, or for horses in extreme northern climates during prolonged cold snaps. These are rarely needed for unclipped horses.

A General Temperature Guide

For a fully clipped horse:

50 degrees and above: No blanket or a light sheet
40 to 50 degrees: Lightweight blanket
30 to 40 degrees: Medium weight blanket
20 to 30 degrees: Heavy weight blanket
Below 20 degrees: Heavy blanket, possibly with a liner underneath

For an unclipped horse in good condition with shelter access:

40 degrees and above: No blanket needed
20 to 40 degrees with rain or wind: Waterproof sheet or lightweight blanket
Below 10 degrees with wind and wet: Medium weight blanket
Extreme cold below 0 degrees: Medium to heavy blanket, especially overnight

These are starting guidelines. You know your horse best. Watch for signs of being cold (shivering, tucked-up posture, standing with tail clamped) or too warm (sweating under the blanket, restlessness).

How to Fit a Horse Blanket Properly

A poorly fitting blanket is worse than no blanket at all. It can rub raw spots, restrict movement, slip and tangle, and leave gaps where cold air and rain get in. Here's how to ensure a good fit:

Measuring Your Horse

Measure from the center of the chest, along the side of the body, to the point of the buttock. This measurement in inches corresponds to the blanket size. Most blankets run in even sizes from 68 to 84 inches.

Fit Checkpoints

Chest: The front closure should fasten comfortably with room for one flat hand between the blanket and chest. Too tight restricts shoulder movement; too loose allows the blanket to shift
Shoulders: The blanket should sit in front of the withers without pressing down on them. The shoulder area needs enough room for free movement at walk, trot, and while lying down
Belly: Belly straps or surcingles should be snug but not tight, with about a hand's width of clearance. Cross belly straps in an X pattern to prevent them from hanging dangerously low
Leg straps: Hind leg straps should loop through each other between the hind legs and be adjusted so they sit snugly without hanging loose (a loose leg strap is a serious entanglement hazard)
Tail: The blanket should extend past the tail but not hang so long that the horse steps on it. A tail flap provides extra coverage

Common Fitting Problems

Watch for these issues that indicate poor fit:

Rubbed patches at the shoulders or withers (blanket is too tight or shifting)
The blanket rotating to one side (wrong size or improperly adjusted surcingles)
Bunching at the hindquarters (blanket is too long)
Gap at the neck where rain enters (consider a neck cover or high-neck blanket style)

Blanketing Mistakes to Avoid

Over the years, I've seen and made plenty of blanketing errors. Here are the biggest ones:

Blanketing too early in fall: If you put a blanket on before your horse has had a chance to grow their winter coat, you'll suppress coat growth and create a horse that's dependent on blanketing all winter. Let them develop their natural coat first, and only blanket once cold weather truly arrives.

Not checking under the blanket regularly: Out of sight, out of mind is dangerous. Check under blankets daily for rubbing, weight loss, skin conditions, or injuries you might miss beneath all that fabric. I make it a habit to remove blankets during grooming sessions at least three times a week.

Using a blanket on a wet horse: Never blanket a horse that's wet from rain or sweat. The blanket traps moisture against the skin, which actually makes the horse colder and can cause skin problems. Dry the horse first, or at minimum use a moisture-wicking cooler until they're dry.

Over-blanketing: This is more common than under-blanketing. An overheated horse will sweat, which then makes them wet and cold when the temperature drops. If your horse is sweating under their blanket, you need a lighter weight.

Not having multiple blankets: If your single blanket gets wet or damaged, your horse has nothing. Ideally, have at least two turnout blankets so one can dry while the other is in use.

Blanket Care and Maintenance

A well-maintained blanket lasts many seasons and performs better:

Repair small tears promptly before they become large tears. Most tack shops sell blanket repair tape and patches
Wash blankets at the end of each season. Many laundromats don't allow horse blankets, so look for equine blanket wash services or use a large front-loading machine at home
Reproof waterproof blankets annually with a spray-on waterproofing treatment. Over time, the DWR (durable water repellent) coating breaks down
Store clean, dry blankets in a rodent-proof container during the off-season. Mice love nesting in stored blankets and will chew through straps and fabric
Check all hardware (buckles, snaps, elastic straps) before the season starts and replace anything worn or broken

Trust Your Horse and Your Judgment

At the end of the day, blanketing decisions come down to knowing your individual horse and observing how they respond to weather conditions. A horse that's standing relaxed with a dry, fluffy coat in 25 degree weather probably doesn't need a blanket. A horse that's shivering with a rain-soaked coat in 40 degree weather definitely does. Pay attention, adjust as conditions change, and don't let anyone make you feel guilty for either blanketing or not blanketing. You're the one who knows your horse best.

Frequently Asked Questions

At what temperature should I blanket my horse?

There's no single temperature threshold because it depends on factors like whether your horse is clipped, their body condition, access to shelter, and whether conditions are wet or windy. As a general guideline, most healthy unclipped horses with shelter don't need blankets above 30-40 degrees Fahrenheit. Clipped horses typically need blanketing below 50 degrees.

Can you over-blanket a horse?

Yes, and it's actually more common than under-blanketing. An over-blanketed horse sweats underneath, which then causes them to chill when temperatures drop. Signs of over-blanketing include sweating under the blanket, restlessness, and a damp coat when you remove the blanket. Always err on the lighter side and add layers only when needed.

Should I blanket my horse in the rain?

If your horse has no access to shelter during cold rain, a waterproof turnout sheet or blanket is very beneficial. Wet fur loses nearly all its insulating ability, making a horse much colder than the temperature alone would suggest. A waterproof sheet in 45-degree rain can be more important than a heavy blanket in dry 20-degree weather.

How do I know if my horse is cold?

Check for shivering, a tucked-up stance, a clamped tail, and reluctance to move. You can also feel the base of their ears and touch behind the elbows; if these areas feel cold, your horse is likely chilled. A warm, relaxed horse will have warm ear bases and will stand comfortably even in cool weather.

Do horses need blankets if they have a shelter or barn?

Most healthy, unclipped horses with access to a three-sided shelter or barn can handle winter without blankets, even in cold climates. The shelter protects them from wind and precipitation, which are the two factors that most compromise their natural insulation. Clipped, senior, or underweight horses may still benefit from blanketing even with shelter.