Agricultural Situation, Vol. 61 : The Crop Reporters Magazine; March 1977 (Classic Reprint)

Excerpt from Agricultural Situation, Vol. 61: The Crop Reporters Magazine; March 1977

Developed by heating engineers at the turn of the century, the degree day relates average temperature to fuel needs. Today, professional engineers use the degree day statistic for a number of purposes, such as checking the efficiency of large heating plants.

Extensive studies have shown that when the average outdoor temperature (the high and low readings for each day divided by 2) measures 65° or higher, most buildings need no heat to maintain an inside temperature of at least Each degree below 65° counts as 1 degree day. For example, when the average daily temperature pencils out to then 4 degree days have accumulated in that 24-hour period. If the average temperature exceeds the heating degree day value is zero.

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