So, the temperature of a cold-blooded animal depends on the temperature of its surroundings. For example, a lizard basking in the sun on a hot day may have a body temperature of 35 degrees Celsius (95 degrees Fahrenheit), while the same lizard at night, when the temperature drops, may have a body temperature of 15 degrees Celsius (59 degrees Fahrenheit).
In general, cold-blooded animals are most active during the warmest parts of the day, when their body temperature is highest. When the temperature drops, they become less active or may even enter a state of dormancy.
Some cold-blooded animals have adaptations that help them regulate their body temperature to some extent. For example, some desert lizards have the ability to change the color of their skin to reflect or absorb sunlight. Others, such as turtles and snakes, can move between warm and cool areas to maintain a preferred body temperature.
Overall, the temperature of a cold-blooded animal is determined by the temperature of its environment, and it fluctuates accordingly.