VACAVILLE, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(049200) VACAVILLE
From Year=1948 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
65 596 404 328 198 72 12 1 1 8 87 345 578 2630
60 441 264 185 91 19 1 0 0 1 24 204 423 1653
57 349 184 113 48 6 0 0 0 0 9 131 331 1170
55 289 135 74 28 2 0 0 0 0 4 92 272 896
50 153 46 17 5 0 0 0 0 0 0 28 139 388
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