SEQUIM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457538) SEQUIM
From Year=1916 To Year=1980
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 846 687 682 524 383 234 155 137 224 452 651 789 5764
60 691 546 527 374 233 102 43 31 96 298 501 634 4076
57 598 461 434 285 151 45 11 6 43 208 411 541 3193
55 536 405 372 227 102 21 4 2 22 154 351 479 2673
50 381 264 220 97 23 1 0 0 2 52 206 325 1571
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