The Weather Page

April 05, 2007|By FRANK ROYLANCE | FRANK ROYLANCE,Sun Reporter -- Weather Blogger

Dennis Mangold has a NOAA Weather Radio up in Ten Hills. "I hear them use the terms `heating degree days,' and `cooling degree days.' What are they and how are they computed?" Degree days are a proxy measure of demand for heating or cooling energy. Got a pencil? Take the day's average temperature. Subtract to find the difference from 65 degrees. If today averages 50 degrees, that's 15 heating degree days. A 75-degree average yields 10 cooling degree days. Tallied by month or season, they provide useful comparisons.

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