ARIEL DAM, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(450242) ARIEL DAM
From Year=1930 To Year=1971
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 0 -99 -99 22 81 182 256 -99 223 74 0 0 -99
57 0 -99 -99 13 54 134 197 -99 173 52 0 0 -99
60 0 -99 -99 3 25 79 125 -99 110 22 0 0 -99
65 0 -99 -99 0 3 22 32 -99 34 2 0 0 -99
70 0 -99 -99 0 0 4 6 -99 5 0 0 0 -99
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