PORTAL 4 SW, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(026716) PORTAL 4 SW
From Year=1965 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
65 816 654 567 363 163 20 0 4 59 304 591 819 4360
60 661 512 412 219 59 2 0 0 10 163 441 664 3145
57 568 428 320 143 26 1 0 0 3 98 352 571 2508
55 506 372 261 101 13 0 0 0 1 65 293 509 2123
50 352 235 133 35 2 0 0 0 0 19 162 355 1294
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