SEATTLE MAPLE LEAF R, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(457463) SEATTLE MAPLE LEAF R
From Year=1941 To Year=1960
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 1 12 67 125 290 257 153 37 0 0 942
57 0 0 1 5 45 83 231 197 109 20 0 0 689
60 0 0 0 1 24 41 149 115 56 7 0 0 393
65 0 0 0 0 6 12 61 34 13 1 0 0 127
70 0 0 0 0 1 4 21 7 1 0 0 0 34
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 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