HEALDSBURG, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(043875) HEALDSBURG
From Year=1931 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
65 533 380 329 214 99 25 5 5 17 107 325 517 2557
60 379 240 185 97 27 3 1 0 1 31 186 363 1513
57 287 162 112 49 8 1 1 0 0 10 114 272 1017
55 229 116 73 28 3 0 1 0 0 4 76 214 744
50 103 36 16 4 0 0 1 0 0 0 17 93 271
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