A wide range of factors, other than being sick, can affect your body temperature. For instance, your temperature can vary depending on the time of day. It’s usually higher in the evening than in the morning. For children, temperature can vary depending what method you use to take it. A rectal temperature might be slightly different from one taken in the armpit or ear. Other things that can affect body temperature:
Heavy clothing.
High humidity.
High room temperature.
Medicines.
Physical activity.
Strong emotions.
Your menstrual cycle.