WHITMAN MISSION, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(459200) WHITMAN MISSION
From Year=1962 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
65 964 754 621 436 240 82 17 23 142 451 720 959 5409
60 809 612 467 292 124 23 2 4 58 303 570 804 4067
57 716 528 375 211 71 7 0 1 29 222 482 712 3355
55 655 472 315 163 45 3 0 0 17 174 424 650 2917
50 503 335 178 66 9 0 0 0 4 77 285 498 1954
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