MOUNT DIABLO JUNCTION, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(045915) MOUNT DIABLO JUNCTION
From Year=1952 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 556 462 472 349 234 102 23 21 43 141 363 528 3294
60 403 324 324 221 127 40 5 4 11 63 230 376 2128
57 314 246 242 155 77 19 1 1 4 33 161 289 1541
55 257 197 191 116 51 10 0 0 1 20 121 234 1200
50 133 93 87 45 11 1 0 0 0 3 46 117 536
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 Jul 28, 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