PRIEST RAPIDS DAM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(456747) PRIEST RAPIDS DAM
From Year=1956 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
65 969 727 555 319 117 21 2 1 39 315 674 961 4701
60 814 586 400 183 43 3 0 0 9 182 525 806 3552
57 721 501 309 116 18 1 0 0 3 118 436 713 2936
55 659 445 250 79 8 0 0 0 1 84 377 651 2555
50 506 306 122 20 1 0 0 0 0 30 239 498 1721
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