MUD MOUNTAIN DAM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(455704) MUD MOUNTAIN DAM
From Year=1939 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
65 860 723 724 579 424 279 150 140 243 471 680 828 6102
60 705 581 569 431 280 153 55 46 125 320 530 673 4468
57 612 497 476 344 202 91 22 15 70 235 440 580 3585
55 550 440 415 288 154 58 9 5 43 183 381 518 3045
50 397 303 266 160 60 10 1 0 7 79 239 364 1887
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