WITTMANN 4SW, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(029464) WITTMANN
From Year=1923 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
65 458 333 220 70 12 0 0 0 0 20 195 416 1725
60 306 202 110 26 3 0 0 0 0 5 96 266 1013
57 222 135 63 12 1 0 0 0 0 2 57 184 676
55 170 98 40 7 0 0 0 0 0 1 38 137 491
50 73 35 9 1 0 0 0 0 0 0 11 52 182
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