Temperatures below 12°C (55°F) are too cold for rabbits and they should not be exposed to temperatures below freezing for extended periods of time. At very low temperatures, heat loss can be more significant and rabbits may struggle to maintain their body heat, leading to hypothermia.
Temperatures above 25°C (77°F) can cause heat stress in rabbits. Heat stroke can occur when the rabbit cannot cool down fast enough, leading to a range of symptoms including lethargy, panting, red ears and dehydration.
Rabbits should be provided with a cool place to rest, such as a shaded area or a cool tile, where they can go to escape the heat. During hot weather, it is also important to provide plenty of fresh water and avoid leaving rabbits in direct sunlight.
If you think your rabbit is suffering from heat or cold stress, it is important to seek veterinary attention immediately.