SAN MARCOS RCH, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047861) SAN MARCOS RANCH
From Year=1952 To Year=1960
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 502 396 376 258 159 66 6 12 29 127 288 414 2634
60 349 260 228 131 60 15 1 1 4 43 162 265 1518
57 262 186 151 74 26 5 0 0 1 18 102 184 1008
55 206 141 106 47 13 2 0 0 0 8 73 136 732
50 93 55 32 11 1 0 0 0 0 1 23 49 265
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