RIFLE, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(057031) RIFLE
From Year=1910 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 0 7 73 250 508 739 965 900 614 294 39 2 4392
40 S 0 8 81 331 838 1577 2542 3443 4056 4350 4390 4392 4392
45 M 0 1 22 134 357 589 810 745 464 163 9 0 3294
45 S 0 1 23 156 513 1102 1912 2658 3122 3285 3294 3294 3294
50 M 0 0 4 53 218 440 655 590 319 66 1 0 2345
50 S 0 0 4 57 275 714 1369 1960 2279 2344 2345 2345 2345
55 M 0 0 0 13 103 295 500 436 184 15 0 0 1546
55 S 0 0 0 13 117 411 911 1347 1531 1546 1546 1546 1546
60 M 0 0 0 1 31 162 345 282 76 1 0 0 899
60 S 0 0 0 1 32 195 540 821 898 899 899 899 899
Corn Growing Degree Days
50 M 2 18 94 218 372 492 599 572 438 271 73 7 3157
50 S 2 20 114 333 704 1196 1795 2368 2806 3077 3150 3157 3157
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