HUMPTULIPS SALMON HTCH, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(453826) HUMPTULIPS SALMON HATCH
From Year=1987 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
65 755 665 665 526 396 271 161 143 232 463 640 787 5704
60 600 524 510 376 249 137 45 35 103 309 490 632 4009
57 507 439 417 289 168 70 11 8 50 220 400 539 3117
55 445 382 355 232 121 37 3 1 27 166 340 477 2586
50 291 243 205 106 36 3 0 0 3 60 198 322 1466
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