JORDAN, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(244522) JORDAN
From Year=1905 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 2 7 50 197 474 734 1006 936 562 249 36 4 4256
40 S 2 10 59 257 730 1464 2470 3405 3968 4217 4252 4256 4256
45 M 0 2 18 107 331 584 851 781 419 144 11 1 3248
45 S 0 2 20 127 458 1042 1893 2673 3093 3236 3247 3248 3248
50 M 0 0 4 49 205 436 696 626 286 69 2 0 2374
50 S 0 0 5 54 259 695 1391 2016 2303 2371 2374 2374 2374
55 M 0 0 0 18 110 295 541 472 172 26 0 0 1634
55 S 0 0 0 18 128 423 964 1436 1608 1633 1634 1634 1634
60 M 0 0 0 5 49 173 388 323 87 6 0 0 1031
60 S 0 0 0 5 54 227 615 938 1025 1031 1031 1031 1031
Corn Growing Degree Days
50 M 4 11 58 167 316 456 623 581 383 215 46 8 2868
50 S 4 15 73 240 556 1012 1635 2216 2599 2814 2860 2868 2868
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