WILLIAMS, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(029359) WILLIAMS
From Year=1897 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 1012 857 805 563 333 99 13 26 136 434 728 965 5972
60 857 716 650 414 195 36 1 3 49 284 578 810 4592
57 764 631 557 326 129 17 0 0 23 204 488 717 3858
55 702 575 495 271 94 10 0 0 14 158 428 655 3403
50 547 434 344 153 38 2 0 0 3 73 286 501 2382
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