ARAPAHOE 14N, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(050301) ARAPAHO 14 N
From Year=1992 To Year=2007
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 30 42 128 252 543 824 1051 978 682 388 85 30 5032
40 S 30 72 200 452 995 1819 2869 3848 4530 4918 5002 5032 5032
45 M 9 16 64 151 395 675 896 823 535 260 39 9 3873
45 S 9 26 89 241 636 1311 2207 3030 3565 3825 3864 3873 3873
50 M 2 4 24 77 259 526 741 668 392 153 13 2 2863
50 S 2 6 30 108 367 893 1634 2303 2694 2848 2861 2863 2863
55 M 0 1 6 30 148 381 586 514 261 75 2 0 2005
55 S 0 1 7 38 186 567 1153 1667 1928 2003 2005 2005 2005
60 M 0 0 1 7 71 244 432 362 151 30 0 0 1300
60 S 0 0 1 9 80 324 756 1118 1270 1300 1300 1300 1300
Corn Growing Degree Days
50 M 45 60 133 208 342 506 658 611 433 287 86 48 3418
50 S 45 105 238 447 789 1295 1953 2564 2997 3284 3370 3418 3418
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