CHIEF JOSEPH DAM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(451400) CHIEF JOSEPH DAM
From Year=1949 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1188 913 711 417 196 54 9 9 103 446 819 1123 5988
60 1033 772 556 273 91 13 1 1 38 298 669 968 4713
57 940 687 463 192 48 4 0 0 17 217 579 875 4024
55 878 631 401 144 29 2 0 0 10 168 520 813 3596
50 723 489 253 54 4 0 0 0 1 72 372 658 2628
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 Jul 28, 2006
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