BIG SKY 2 WNW, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(240775) BIG SKY 3 S
From Year=1984 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 1 7 47 183 368 603 563 323 101 6 0 2201
40 S 0 1 7 54 238 605 1208 1772 2094 2195 2201 2201 2201
45 M 0 0 0 12 87 231 448 409 191 38 1 0 1416
45 S 0 0 0 12 99 330 778 1187 1378 1416 1416 1416 1416
50 M 0 0 0 1 30 117 296 259 87 9 0 0 798
50 S 0 0 0 1 31 148 444 703 790 798 798 798 798
55 M 0 0 0 0 4 41 155 122 26 1 0 0 351
55 S 0 0 0 0 4 45 201 323 349 351 351 351 351
60 M 0 0 0 0 0 7 50 30 4 0 0 0 91
60 S 0 0 0 0 0 7 57 87 91 91 91 91 91
Corn Growing Degree Days
50 M 0 1 15 67 175 283 435 429 285 124 10 0 1824
50 S 0 1 17 84 258 541 976 1405 1690 1814 1824 1824 1824
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