SAN BERNARDINO, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047723) SAN BERNARDINO
From Year=1927 To Year=2004
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 380 291 252 137 56 10 0 0 2 44 198 356 1724
60 234 165 126 55 13 1 0 0 0 10 89 210 902
57 157 102 70 26 4 0 0 0 0 3 46 135 543
55 113 69 43 14 2 0 0 0 0 1 28 93 363
50 41 19 9 2 0 0 0 0 0 0 5 29 104
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