WHITMAN MISSION, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(459200) WHITMAN MISSION
From Year=1962 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 966 751 617 429 236 82 18 23 144 447 717 946 5374
60 811 610 462 285 120 23 2 4 60 298 567 791 4033
57 718 525 371 206 68 7 0 1 31 218 478 698 3321
55 656 470 311 157 43 3 0 0 18 170 420 636 2884
50 505 333 175 62 8 0 0 0 4 74 281 485 1927
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 Jul 28, 2006
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