SMYRNA, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457727) SMYRNA
From Year=1951 To Year=2008
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1056 790 627 380 164 35 5 6 95 405 770 1033 5365
60 901 649 472 238 70 7 1 0 34 261 620 878 4132
57 808 564 380 161 34 2 0 0 16 186 530 785 3467
55 746 508 320 117 19 1 0 0 9 142 471 723 3056
50 592 369 181 39 2 0 0 0 1 60 328 569 2142
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