CONCORD WASTEWATER PLAN, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(041967) CONCORD WASTEWATER PLAN
From Year=1991 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 6 23 90 160 319 451 551 561 485 311 74 11 3043
57 2 10 57 116 258 391 489 499 425 250 45 5 2547
60 0 2 23 63 173 302 396 406 335 165 18 1 1886
65 0 0 3 18 69 164 242 252 189 61 1 0 1000
70 0 0 0 3 21 68 106 111 75 14 0 0 399
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