SPIRIT LAKE RANGER STN, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457919) SPIRIT LAKE RANGER STN
From Year=1932 To Year=1956
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1133 991 1021 814 688 503 233 233 371 640 867 1002 8496
60 978 850 866 665 534 360 116 112 231 485 717 847 6760
57 885 765 773 576 443 279 65 60 156 393 627 754 5777
55 823 708 711 516 383 228 42 36 114 333 567 692 5154
50 668 567 556 369 237 115 11 6 42 195 417 537 3719
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