LONGMIRE RAINIER NPS, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(456894) RAINIER LONGMIRE
From Year=1909 To Year=1978
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1081 900 901 714 517 319 163 166 298 566 831 1011 7468
60 926 759 746 565 368 190 66 68 175 413 681 856 5814
57 833 674 654 476 283 126 31 32 115 325 591 763 4905
55 771 618 592 417 231 90 17 18 83 270 531 701 4338
50 616 477 438 275 121 29 2 2 28 148 382 546 3064
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