CARLYLE 12 NW, MONTANA

Period of Record General Climate Summary - Heating Degree Days

Station:(241518) CARLYLE 12 NW
From Year=1962 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 1515 1209 1060 662 365 120 27 43 244 583 1021 1389 8239
60 1360 1068 905 516 234 48 6 13 144 435 871 1234 6833
57 1267 983 813 431 168 22 2 5 98 351 781 1141 6064
55 1205 927 751 377 131 12 1 2 74 300 722 1079 5580
50 1050 786 599 252 61 2 0 0 32 188 575 924 4470
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