BLACKFOOT, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(100915) BLACKFOOT 2 SSW
From Year=1895 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 5 48 200 441 659 925 860 550 247 34 4 3974
40 S 2 6 54 254 696 1354 2279 3139 3689 3936 3970 3974 3974
45 M 0 1 14 102 296 509 770 705 403 135 8 0 2943
45 S 0 1 15 117 413 922 1691 2396 2799 2934 2942 2943 2943
50 M 0 0 3 41 172 362 615 550 265 57 1 0 2067
50 S 0 0 3 44 216 578 1193 1743 2008 2066 2067 2067 2067
55 M 0 0 0 11 81 227 460 396 147 17 0 0 1342
55 S 0 0 0 12 93 320 780 1177 1324 1341 1342 1342 1342
60 M 0 0 0 2 28 117 308 249 62 3 0 0 769
60 S 0 0 0 2 30 147 455 704 766 769 769 769 769
Corn Growing Degree Days
50 M 0 4 44 158 295 423 588 555 380 194 33 2 2675
50 S 0 4 48 206 501 924 1512 2067 2446 2641 2674 2675 2675
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