PHOENIX CITY, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(026486) PHOENIX CITY
From Year=1948 To Year=1998
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 68 135 265 485 757 1005 1174 1129 940 644 250 77 6927
57 42 97 211 427 695 945 1112 1067 880 582 200 47 6304
60 16 53 141 342 602 855 1019 974 790 491 133 17 5432
65 1 13 56 212 449 705 864 819 640 342 51 2 4154
70 0 2 15 105 303 555 709 664 490 208 10 0 3060
Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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