BRIDGER, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(241102) BRIDGER
From Year=1900 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 9 19 71 214 464 694 947 888 560 283 62 14 4225
40 S 9 28 99 313 777 1472 2419 3306 3866 4150 4211 4225 4225
45 M 2 4 27 117 321 545 792 733 416 169 23 4 3152
45 S 2 6 33 150 471 1016 1808 2540 2956 3125 3148 3152 3152
50 M 0 1 8 53 195 397 637 578 281 84 6 1 2242
50 S 0 1 9 62 257 654 1292 1869 2150 2234 2241 2242 2242
55 M 0 0 1 18 100 259 482 424 165 32 1 1 1484
55 S 0 0 1 20 120 379 861 1285 1450 1482 1483 1484 1484
60 M 0 0 0 4 41 143 330 275 79 8 0 1 882
60 S 0 0 0 4 45 189 519 794 872 881 881 882 882
Corn Growing Degree Days
50 M 7 18 71 170 308 434 588 555 379 216 52 10 2807
50 S 7 24 95 265 573 1007 1595 2150 2529 2745 2797 2807 2807
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