BERRYESSA LAKE, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(040705) BERRYESSA LAKE
From Year=1957 To Year=1970
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 557 406 384 241 98 17 0 2 6 62 306 532 2611
60 402 266 235 129 33 3 0 0 0 13 171 379 1632
57 310 186 155 82 14 1 0 0 0 3 103 288 1142
55 250 137 109 57 7 1 0 0 0 1 68 229 857
50 115 43 29 17 1 0 0 0 0 0 15 100 320
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 Oct 31, 2012
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