WINTHROP 1 WSW, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(459376) WINTHROP 1 WSW
From Year=1906 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1408 1091 880 541 318 133 32 42 209 560 967 1326 7506
60 1253 949 725 392 181 48 6 9 102 407 817 1171 6060
57 1160 865 632 306 115 20 2 3 58 318 727 1078 5281
55 1098 808 570 250 79 10 1 1 37 262 667 1016 4798
50 943 667 415 129 24 1 0 0 8 139 517 861 3704
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