PORTAL, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(026706) PORTAL
From Year=1914 To Year=1955
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 738 585 491 220 107 9 1 1 18 191 484 706 3549
60 583 444 340 117 40 1 0 0 3 94 336 551 2508
57 490 359 254 75 19 0 0 0 0 54 254 458 1964
55 429 305 202 53 11 0 0 0 0 34 204 397 1634
50 285 183 98 18 1 0 0 0 0 8 105 253 951
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