WALLA WALLA FAA AIRPORT, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(458928) WALLA WALLA FAA AIRPORT
From Year=1949 To Year=2012
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 1 1 5 43 165 356 613 590 318 70 3 1 2165
57 0 0 2 28 125 299 551 528 264 47 2 0 1847
60 0 0 1 13 78 220 459 435 190 24 0 0 1420
65 0 0 0 3 31 116 309 288 93 5 0 0 845
70 0 0 0 0 9 51 180 161 34 0 0 0 435
Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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