COTTONWOOD, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(102154) COTTONWOOD
From Year=1893 To Year=1976
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 4 7 38 144 338 516 807 773 510 240 38 6 3420
40 S 4 10 48 192 530 1046 1853 2626 3136 3376 3414 3420 3420
45 M 0 1 10 66 207 369 652 618 366 130 9 1 2429
45 S 0 1 12 77 284 653 1305 1922 2288 2419 2428 2429 2429
50 M 0 0 1 23 107 232 498 463 234 56 1 0 1616
50 S 0 0 1 24 131 363 861 1324 1558 1614 1616 1616 1616
55 M 0 0 0 5 44 123 346 314 128 18 0 0 979
55 S 0 0 0 5 50 173 519 833 961 979 979 979 979
60 M 0 0 0 1 13 53 208 180 55 3 0 0 514
60 S 0 0 0 1 14 67 275 456 511 514 514 514 514
Corn Growing Degree Days
50 M 1 3 25 96 202 304 512 495 327 151 19 2 2139
50 S 1 4 29 126 328 632 1145 1639 1967 2118 2137 2139 2139
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