Diurnal

During the daytime.

An event that occurs repetitively on a daily basis, generally during daylight hours.

Daily; related to actions which are completed in the course of a calendar day, and which typically recur every calendar day (e.g., diurnal temperature rises during the day, and diurnal falls at night).

Means daily, especially pertaining to actions which are completed in 24 hours and are repeated every 24 hours.