SAN FRAN MISSION DOLORE, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047772) SAN FRAN MISSION DOLORE
From Year=1914 To Year=2005
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 434 314 305 267 240 179 172 147 102 126 232 400 2917
60 279 177 161 132 104 58 47 34 19 30 100 247 1387
57 190 103 89 65 41 15 9 5 3 6 43 160 728
55 135 63 51 32 15 3 1 1 0 1 20 109 432
50 38 10 5 2 0 0 0 0 0 0 1 27 82
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 Apr 5, 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