Normal Variations in Body Temperature

• There is a normal daily awake-sleep cycle variation in temperature, with the low occurring at 6 AM and the high occurring at 6 pm. The low and high temperatures vary by 0.9° F (0.6° C).
• In women, temperature increases about 0.9° F (0.6° C) at the time of ovulation.
• Temperature can go up in response to physical activity, particularly during hot weather.