KETCHUM RS, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(104845) KETCHUM RANGER STN
From Year=1973 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1445 1215 1086 781 553 327 119 165 391 716 1098 1421 9316
60 1290 1074 931 631 401 193 43 65 248 561 948 1266 7650
57 1197 989 838 541 313 129 20 33 173 468 858 1173 6732
55 1135 932 776 482 259 94 12 20 132 408 798 1111 6157
50 980 791 621 338 143 36 2 5 57 265 648 956 4840
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 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