MCNARY DAM, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(455231) MC NARY DAM
From Year=1954 To Year=2008
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 0 0 2 39 194 385 621 596 318 66 3 0 2225
57 0 0 1 23 148 326 559 534 262 43 1 0 1897
60 0 0 0 9 92 242 466 441 183 19 0 0 1454
65 0 0 0 1 33 125 315 290 82 3 0 0 848
70 0 0 0 0 8 51 181 157 26 0 0 0 422
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