Heating Degree Days

  • Application of temperature data to energy consumption:

A heating degree day is defined as:

65F - mean daily temp


Suppose peas are planted in Indiana on May 1. If the peas need 1200 growing degree-days before they can be picked, and if the average maximum temperature for May and June in 80F and the average minimum is 60F, on about what date will the peas be ready to pick? (Assume a base temperature of 55F)

Mean Annual Heating degree days over the U.S. in thousands of F