degree day

• Unité utilisée en météorologie et en technique pour mesurer l'écart entre la température moyenne d'une journée et une température de référence standard, servant notamment à estimer les besoins énergétiques de chauffage ou de climatisation.

A unit used in meteorology and engineering to measure the deviation of the average daily temperature from a standard reference temperature, typically used to estimate energy demand for heating or cooling.

1. Temperature measurement unitC1formal

   A unit used in meteorology and engineering to measure the demand for heating or cooling, calculated as the difference between a base temperature and the average outdoor temperature over a day.

   degré-jour

   • The heating bill was high due to the large number of degree days this winter.
   • Engineers use degree days to estimate energy consumption for buildings.
   • Cooling degree days are calculated when the average temperature exceeds a certain threshold.