RALSTON RSVR, COLORADO

Period of Record General Climate Summary - Cooling Degree Days

Station:(056816) RALSTON RESERVOIR
From Year=1978 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 0 0 10 32 149 367 601 502 267 61 11 0 2000
57 0 0 5 21 113 313 540 441 217 41 6 0 1696
60 0 0 1 9 69 235 448 350 152 20 1 0 1286
65 0 0 0 1 23 126 298 207 68 4 0 0 728
70 0 0 0 0 5 52 158 87 19 0 0 0 321
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