TROUTDALE SUBSTATION, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(358634) TROUTDALE SUBSTATION
From Year=1948 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
65 794 623 559 406 257 116 32 30 105 330 567 765 4585
60 639 482 404 262 133 36 3 2 31 188 418 610 3207
57 546 397 312 182 75 11 0 0 11 117 329 517 2498
55 484 341 253 134 45 4 0 0 5 78 271 456 2070
50 333 206 121 43 7 0 0 0 0 20 140 304 1174
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