HARTLINE, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(453529) HARTLINE
From Year=1927 To Year=2005
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1225 945 758 488 273 103 21 29 145 489 883 1152 6511
60 1070 803 603 343 152 37 4 7 67 341 733 997 5156
57 977 719 510 260 96 16 1 3 37 258 643 904 4424
55 915 662 449 209 66 8 0 2 24 207 583 842 3967
50 760 521 298 101 19 1 0 1 6 103 433 687 2930
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