EL CAJON, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(042706) EL CAJON
From Year=1979 To Year=2012
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 76 84 143 238 352 453 621 667 587 405 175 62 3861
57 45 52 95 183 290 393 559 605 527 343 126 34 3251
60 16 21 44 110 200 303 466 512 437 253 67 10 2438
65 2 2 7 31 77 158 311 357 288 118 15 1 1367
70 0 0 1 5 15 50 159 203 151 35 3 0 623
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 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