HAMILTON, MONTANA

Period of Record General Climate Summary - Heating Degree Days

Station:(243885) HAMILTON
From Year=1895 To Year=2004
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1219 979 844 567 353 169 42 60 260 572 904 1170 7140
60 1064 838 689 419 219 77 10 19 146 420 754 1015 5671
57 971 753 597 334 152 40 3 8 94 333 665 922 4872
55 909 697 535 280 114 24 1 4 67 278 605 860 4373
50 754 556 385 159 45 4 0 1 25 159 457 705 3250
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