SNOQUALMIE FALLS, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457773) SNOQUALMIE FALLS
From Year=1931 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 809 668 647 491 343 200 96 91 212 440 638 782 5417
60 654 526 492 343 201 83 21 18 92 288 488 627 3834
57 561 442 399 258 127 36 5 3 43 203 399 534 3011
55 500 386 338 204 86 17 2 1 23 152 340 472 2520
50 347 250 193 88 19 1 0 0 3 56 202 319 1480
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 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