LOWER MONUMENTAL DAM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(454841) LOWER MONUMENTAL DAM
From Year=1962 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
65 971 685 586 383 166 38 3 5 59 321 649 894 4759
60 816 544 431 239 72 8 0 0 18 186 499 739 3551
57 723 459 340 161 35 3 0 0 8 117 409 646 2900
55 661 403 281 115 19 1 0 0 4 81 350 584 2497
50 507 264 149 32 1 0 0 0 0 24 209 429 1616
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