Mira Ceti is a variable star, meaning its temperature fluctuates. Its temperature ranges from approximately 2,000 K to 3,500 K.

* During its coolest phase, it is a red giant star, with a surface temperature close to 2,000 K.

* During its hottest phase, it reaches a temperature of around 3,500 K.

This temperature variability is directly linked to its pulsating nature, causing its size and brightness to change significantly over a period of about 332 days.