Does a Chihuahua Need a Coat in Winter? What to Put On Your Chihuahua
By the PuppyUnion team · Updated
Yes – most Chihuahuas need a sweater or coat in cold weather. They're tiny, lean and often short-haired, so they lose heat fast; many are uncomfortable below about 45°F (7°C) and need an insulated coat below freezing (32°F / 0°C). Most adult Chihuahuas wear XXS or XS.
Sweater or coat?
| Weather | What works |
|---|---|
| Cool and dry, or a cold house | A soft, stretchy sweater or hoodie |
| Below freezing, wind, snow | An insulated winter coat that covers the chest and belly |
| Rain or sleet | A lined raincoat – wet fur loses warmth fast |
| Cold nights | Light pajamas if your home is cool and your dog shivers at night |
Sizing a Chihuahua
- Typical chest girth is about 9–14" (23–36 cm) and back length about 6–10" (15–25 cm) – reference only.
- Measure the chest under the fur behind the front legs and add about 2" (5 cm). Many Chihuahuas need XXS; an XS that gapes at the chest won't keep them warm.
- Check the neck: a big head and a small neck means the neck opening should stretch over the head without being loose once on.
- Avoid heavy coats that drag or restrict movement – a tiny dog needs light, warm layers.
See our Chihuahua clothes – they only show styles with an XXS, XS or a chest of 14" or less.
Winter tips for tiny dogs
- Keep walks short on very cold days and use the "feels like" temperature.
- Take wet clothes off as soon as you're home and dry your dog.
- Watch for shivering, lifting paws or refusing to walk – go back inside.
- Take coats off indoors so your dog doesn't overheat.
Very young, old or underweight Chihuahuas are more sensitive to cold. If yours seems weak or lethargic after being out in the cold, call your vet.
Frequently asked questions
What size coat does a Chihuahua wear?
Most adult Chihuahuas wear XXS or XS, with a chest of about 9–14 inches. Measure your dog's chest behind the front legs and add about 2 inches.
Should a Chihuahua wear a sweater indoors?
If your home is cool and your Chihuahua shivers, a light sweater is fine. Take it off if your dog pants or seems warm, and don't leave heavy coats on indoors.
At what temperature does a Chihuahua need a coat?
Many Chihuahuas are more comfortable in a sweater below about 45°F (7°C) and need an insulated coat below freezing (32°F / 0°C), especially in wind or wet snow.