FOUNTAIN HILLS, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(023190) FOUNTAIN HILLS
From Year=1979 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 341 239 137 40 3 0 0 0 0 12 142 357 1271
60 196 126 58 13 0 0 0 0 0 4 64 212 673
57 124 75 28 5 0 0 0 0 0 2 35 138 407
55 85 50 16 3 0 0 0 0 0 1 22 98 274
50 25 14 2 0 0 0 0 0 0 0 6 32 80
Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu