WALLA WALLA WB CITY, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(458931) WALLA WALLA WB CITY
From Year=1916 To Year=1987
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 973 696 589 387 195 55 6 9 93 350 673 893 4919
60 818 555 435 249 92 14 1 1 35 213 523 738 3674
57 726 471 345 174 50 5 0 0 17 143 435 645 3009
55 664 416 286 130 29 2 0 0 9 104 377 584 2601
50 516 284 153 46 4 0 0 0 2 38 243 435 1721
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