Keeping pet rats cool in hot weather

Rats can't cool down by sweating, so they overheat easily. Here's what temperature they need, how to help them through a heatwave, and when to call a vet.

This guide is also in the free Rattitude Care app. Get the app

Summer Heat & Cooling

Rats can't cool down by sweating

Rats are most comfortable at 18–24 °C (64–75 °F). Above 26 °C (79 °F), start cooling them down. Above 30 °C (86 °F) there is a real risk of heatstroke.

Rats shed heat mainly through their tails and by spreading saliva on their fur, so they overheat easily. Keep the cage out of direct sun, and during heatwaves give them ways to cool down:

Ceramic / Marble Tiles
Keep a bathroom tile in the cage. It stays cool to the touch for them to lie flat on.
Frozen Bottle in a Sock
Freeze a water bottle and place it inside a thick sock so their skin doesn't get ice burns.
Pea Fishing (Enrichment)
Shallow bowl of cool water with frozen green peas. Lets them submerge their paws safely.

If your rat is limp, breathing fast or has bright red ears and feet, move it somewhere cool, offer water and call a vet.

What temperature do rats need?

Rats are most comfortable at around 18–24 °C (64–75 °F). The RSPCA gives 19–23 °C as ideal, and the PDSA 20 °C. What matters most is avoiding extremes: keep the cage in a part of the home that doesn't get very hot or very cold.

Where should the cage go in summer?

Indoors, out of direct sunlight, and well ventilated but out of draughts — not in a conservatory, garage or shed (RSPCA, PDSA). A spot that is fine in spring can get hot once the summer sun reaches it, so check the cage during the hottest part of the day. Draughts count too: don't point a fan or air conditioner straight at the cage.

What are the signs of heatstroke in rats?

A rat that is limp, breathing fast or has bright red ears and feet may be overheating. Move it somewhere cool, offer water and call a vet straight away — don't wait to see whether it recovers on its own.

Sources

Last updated: September 29, 2026

General guidance based on RSPCA, PDSA and veterinary sources — not a substitute for a vet. Check with an exotic vet before changing your rat's diet or if your rat seems unwell.