SAN RAFAEL RCH SP, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(027555) SAN RAFAEL RANCH
From Year=1892 To Year=2009
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 0 2 7 41 210 488 589 535 412 187 15 0 2486
57 0 1 3 22 162 428 527 473 353 139 6 0 2112
60 0 0 1 8 96 339 434 380 264 79 1 0 1603
65 0 0 0 0 21 202 280 227 122 19 0 0 872
70 0 0 0 0 5 97 136 89 28 2 0 0 356
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