Horse blanket temperature chart: when to blanket a horse
Deciding about tonight? Use the should I blanket my horse tonight checklist to compare the overnight forecast with your horse’s coat, shelter and condition.
What temperature should you blanket a horse? Start with the coat-specific range, then check rain, wind, shelter and the horse's condition. A chart is a starting point, not a universal cutoff.
Quick answer: There is no single temperature when every horse needs a blanket. A healthy, acclimated horse with a dry winter coat, forage and shelter may not need one at 40°F; a clipped, thin, sick, young, senior or unacclimated horse may need protection at warmer temperatures. Check the coat, rain, wind and shelter together.
Use at the barn: this chart includes Fahrenheit and Celsius. Print or save it as a PDF, and keep the coat, rain and shelter notes with the temperature bands.
Check my local weather and blanket recommendation →
Horse blanket temperature chart by coat type
| Air temperature | Full winter coat | Clipped coat | What to check |
|---|---|---|---|
| 40°F and above (≥4°C) | No blanket at 40°F and above in this guide | 40–50°F: rain sheet or lightweight blanket; above 50°F: no range is listed in this guide | Is the horse dry, acclimated and sheltered? Do not extrapolate the clipped-coat range above 50°F. |
| 25–39°F (−4–4°C) | No blanket, or a rain sheet if raining | Lightweight or midweight blanket | Check whether rain or wind reaches the horse and whether the blanket stays dry. |
| 15–24°F (−9–−4°C) | Lightweight or midweight blanket | Heavyweight blanket | Also consider body condition, forage, shelter and how long the horse is exposed. |
| 0–14°F (−18–−10°C) | Heavyweight blanket | Heavyweight blanket; the guide lists a liner and hood below 15°F | Recheck fit, warmth beneath the blanket and the forecast for a daytime warm-up. |
| Below 0°F (below −18°C) | Heavyweight blanket; the guide lists a liner and hood | Heavyweight blanket, liner and hood | Prioritize shelter, unfrozen water, adequate forage and close observation. |
Do not treat 41°F or 18°F as automatic blanket cutoffs. University of Minnesota Extension estimates a lower critical temperature of about 41°F with a summer coat and 18°F with a winter coat; this is the point below which energy needs rise, not a blanket prescription. UMN also says blanketing is necessary in certain higher-risk conditions, including turnout without shelter when temperature or wind chill falls below 5°F, a clipped winter coat, wet exposure, lack of cold acclimation, very young or old age, or a body condition score of 3 or less. Use those as assessment cues alongside your horse and local conditions.
Check my horse using tonight's actual forecast →
The calculator fetches local weather for you. Compare its weather-based result with your horse's coat, shelter and condition; it cannot observe your horse.
What do light, medium and heavy blanket weights mean?
Fill grams describe insulation; denier describes the outer fabric. A waterproof sheet provides rain protection without added fill. University of Maine Extension lists light blankets at 60–100 g, medium at 150–300 g and heavy at 300+ g. Product labels vary, so check the manufacturer's fill and waterproofing specifications.
Choose weight after assessing the horse and exposure. A clipped horse and a horse with a full winter coat may need different protection at the same temperature. More fill is not automatically safer: feel beneath the blanket and reduce insulation if the horse is hot or sweating.
Adjust the chart for your horse
- Clipping: A clipped coat traps less warm air. Consider how much coat was removed, whether the horse is stabled and how long it will be outside.
- Rain and wind: A wet or muddy coat loses insulation, and shelter from wind and precipitation changes exposure.
- Body condition and health: Thin, young, senior or sick horses need individual attention. A thick winter coat can hide weight loss.
- Feed and water: Cold increases energy requirements. Adequate forage and unfrozen water matter alongside any blanket.
- Blanket fit: Check under the blanket for sweat, rubbing and a wet lining; adjust it as temperatures change.
How to use this with the live tool
Find the current and overnight temperature band, then check the forecast for rain and wind. Use the live weather calculator for a location-specific recommendation, and compare that result with your horse's coat, body condition, shelter and behavior. The tool's thresholds are adjustable; it cannot see whether your horse is shivering, sweating or ill.
If the horse is shivering, unusually lethargic, losing condition or recovering from illness, seek veterinary advice rather than relying on a chart.
Source and scope
- University of Minnesota Extension: Caring for your horse in the winter — energy needs, coat, moisture, shelter, forage and condition.
- University of Maine Extension: Winter Blanketing Guide for Equines in Maine — blanket fill, clipping, fit and checking for overheating. Its regional temperature chart is a separate guide, not the app's thresholds.
- UGA Cooperative Extension: Should I Blanket My Horse? — shelter, combined weather exposure and individual horse factors.
The Maine ranges above are a regional example; the Minnesota values describe energy needs and higher-risk blanketing situations. Neither creates a universal cutoff. This page is educational and does not replace direct observation or veterinary advice. Updated October 18, 2026.
Horse blanket temperature questions
Does every horse need a blanket below 40°F?
No. A healthy, acclimated horse with a dry winter coat, enough forage and effective shelter may need less protection than a clipped or thin horse. Use the chart with the blanketing checklist, not as a single cutoff.
Should I use the overnight low or the current temperature?
Check the whole period until your next visit: the low, timing of rain, wind exposure and the following warm-up. A blanket suitable overnight may become too warm in the morning. The live forecast tool helps you plan when to recheck.
Can I use a stable blanket in the rain?
Use a blanket rated for outdoor wet conditions. A wet lining can chill the horse; remove saturated equipment and check the coat. See the rain guide before choosing turnout protection.
Is a 100g or 200g blanket right at 40°F?
The gram label alone cannot answer that. It describes insulation, while coat, clipping, dryness and exposure describe the horse's situation. Manufacturers use different weight categories, so compare the actual label and waterproofing rather than assuming every “medium” blanket performs identically.
For example, a dry, full-coated horse with shelter and a clipped horse facing prolonged rain share the same air temperature but need different checks. Use the chart's coat and wet/windy columns, then read the clipped-horse or rain checklist. These are starting considerations, not a promise that a particular fill is safe at 40°F.