EL CAJON YALE RANCH, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(042705) EL CAJON YALE RANCH
From Year=1899 To Year=1959
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 25 41 75 148 256 382 551 572 487 311 139 43 3030
57 12 22 45 103 197 323 489 510 427 250 97 23 2499
60 4 8 17 51 119 234 396 417 337 166 50 7 1806
65 1 1 2 10 31 100 242 263 192 62 12 0 915
70 0 0 0 1 4 24 101 119 79 16 2 0 348
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