EL CAPITAN DAM, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(042709) EL CAPITAN DAM
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
65 316 245 240 140 71 12 0 0 3 28 138 284 1478
60 178 125 114 56 18 2 0 0 0 5 51 151 701
57 110 70 60 26 5 0 0 0 0 2 23 88 384
55 74 43 35 14 2 0 0 0 0 1 12 57 237
50 20 8 5 1 0 0 0 0 0 0 1 14 51
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