AJO, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(020080) AJO
From Year=1914 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 380 234 155 49 8 0 0 0 0 17 139 324 1306
60 236 127 70 16 2 0 0 0 0 5 64 188 707
57 161 78 38 6 1 0 0 0 0 2 35 122 443
55 119 54 23 3 0 0 0 0 0 1 22 87 310
50 47 17 4 0 0 0 0 0 0 0 5 31 105
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 Jul 28, 2006
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