A normal rectal temperature for a healthy adult cat is usually between 38°C and 39.2°C. Kittens may naturally run a little warmer up to 39.4°C.
An above-normal temperature may be a sign of fever, which can occur with infections (viral, bacterial, or fungal), inflammation, heat stress, or other underlying health issues. Persistent high temperatures should always be taken seriously, particularly if your cat is also off their food or showing signs of being unwell.
A below-normal temperature can be just as concerning. It may indicate hypothermia, shock, severe illness, blood loss, or circulatory collapse. Young kittens are especially vulnerable to rapid drops in body temperature, particularly if they are orphaned or sick.
If your cat’s temperature is outside the normal range, seek guidance from your veterinarian. Consider other signs alongside the temperature reading, such as lethargy, reduced appetite, changes in breathing or heart rate, vomiting, diarrhoea, shivering, hiding, or any unusual behaviour.