PHANTOM RANCH, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(026471) PHANTOM RANCH
From Year=1966 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 563 350 191 57 6 0 0 0 0 33 256 553 2009
60 408 213 91 22 1 0 0 0 0 10 138 399 1283
57 317 141 51 11 0 0 0 0 0 4 85 308 916
55 257 99 32 6 0 0 0 0 0 2 57 248 702
50 124 32 8 1 0 0 0 0 0 0 16 117 298
Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
Table updated on Jul 28, 2006
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