SAN JOSE, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047821) SAN JOSE
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
65 472 334 291 201 108 33 6 4 13 90 284 465 2303
60 318 197 151 85 26 3 0 0 0 20 147 311 1259
57 230 124 83 39 7 0 0 0 0 6 83 224 796
55 175 84 50 19 2 0 0 0 0 2 51 170 554
50 67 20 7 2 0 0 0 0 0 0 10 64 170
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