EL CAJON YALE RANCH, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(042705) EL CAJON YALE RANCH
From Year=1899 To Year=1959
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 400 314 281 174 88 17 1 0 5 62 193 345 1880
60 248 180 141 66 21 1 0 0 0 11 80 196 945
57 164 110 76 27 6 0 0 0 0 2 38 119 543
55 115 72 44 13 3 0 0 0 0 1 20 77 344
50 34 17 4 1 0 0 0 0 0 0 3 17 76
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