WEST GLACIER, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(248809) WEST GLACIER
From Year=1949 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 0 0 9 95 332 524 736 697 397 121 10 0 2922
40 S 0 1 10 105 437 961 1697 2394 2791 2912 2922 2922 2922
45 M 0 0 1 35 194 375 581 542 257 45 2 0 2031
45 S 0 0 1 35 230 604 1186 1727 1984 2029 2031 2031 2031
50 M 0 0 0 9 92 233 426 388 138 11 0 0 1298
50 S 0 0 0 10 101 335 761 1149 1288 1298 1298 1298 1298
55 M 0 0 0 2 33 117 276 241 57 1 0 0 728
55 S 0 0 0 2 34 151 427 669 726 727 728 728 728
60 M 0 0 0 0 8 45 145 118 16 0 0 0 332
60 S 0 0 0 0 8 52 197 316 332 332 332 332 332
Corn Growing Degree Days
50 M 0 0 10 79 222 323 472 449 262 79 3 0 1900
50 S 0 0 10 90 312 635 1107 1556 1818 1897 1900 1900 1900
M = Monthly Data
S - Running sum of monthly data.
Growing 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.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
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