GREELEY, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(053546) GREELEY
From Year=1893 To Year=1967
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 5 15 78 254 528 803 1011 951 644 315 55 6 4664
40 S 5 19 97 351 880 1683 2694 3644 4288 4603 4657 4664 4664
45 M 1 3 29 147 381 654 856 796 497 188 15 1 3566
45 S 1 4 33 180 560 1214 2070 2865 3362 3550 3565 3566 3566
50 M 0 0 8 66 245 505 701 641 355 89 2 0 2612
50 S 0 0 8 75 319 824 1525 2165 2521 2609 2612 2612 2612
55 M 0 0 2 20 132 359 546 486 224 30 0 0 1799
55 S 0 0 2 22 153 512 1058 1544 1768 1798 1799 1799 1799
60 M 0 0 0 3 52 224 392 333 116 5 0 0 1125
60 S 0 0 0 3 55 279 671 1003 1120 1125 1125 1125 1125
Corn Growing Degree Days
50 M 23 39 102 207 344 495 627 593 433 273 98 25 3259
50 S 23 61 163 371 714 1209 1836 2429 2862 3135 3233 3259 3259
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