Average temperature, in degrees C, during the 24 hours of the day.
Note: USCRN/USRCRN stations have multiple co-located temperature
sensors that record independent measurements. This value is a single
temperature that is calculated by averaging 24 full-hour averages
derived from the multiple independent measurements of 5-minute intervals
during each hour
Mean temperature, in degrees C, calculated using the typical historical
approach of (T_DAILY_MAX + T_DAILY_MIN) / 2.
Mean temperature gives twice the slope of average