ARIEL DAM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(450242) ARIEL DAM
From Year=1948 To Year=1971
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 748 -99 -99 357 310 113 -99 -99 -99 385 -99 745 -99
60 593 -99 -99 214 168 38 -99 -99 -99 250 -99 590 -99
57 500 -99 -99 139 102 13 -99 -99 -99 187 -99 497 -99
55 438 -99 -99 91 65 6 -99 -99 -99 147 -99 435 -99
50 283 -99 -99 17 19 0 -99 -99 -99 62 -99 293 -99
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