SONOMA, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(048351) SONOMA
From Year=1952 To Year=2005
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 5 17 44 91 208 361 469 459 390 229 40 5 2319
57 2 7 24 60 156 303 407 397 330 174 22 2 1884
60 0 2 8 29 94 218 315 304 242 103 7 0 1322
65 0 0 1 6 32 102 167 157 113 31 1 0 609
70 0 0 0 1 7 37 59 51 35 6 0 0 197
Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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