GRAND VALLEY, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(053508) GRAND VALLEY
From Year=1904 To Year=1981
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 10 101 281 542 808 1048 981 675 328 58 3 4837
40 S 0 11 112 394 935 1743 2791 3772 4448 4776 4834 4837 4837
45 M 0 1 34 158 390 658 893 826 526 196 14 0 3697
45 S 0 1 35 192 582 1240 2133 2960 3486 3682 3696 3697 3697
50 M 0 0 9 65 249 508 738 671 380 95 2 0 2717
50 S 0 0 9 74 322 830 1569 2240 2620 2715 2717 2717 2717
55 M 0 0 2 17 129 360 583 516 242 31 0 0 1880
55 S 0 0 2 19 148 508 1091 1607 1850 1880 1880 1880 1880
60 M 0 0 0 3 47 220 428 362 122 5 0 0 1188
60 S 0 0 0 3 51 271 699 1061 1182 1188 1188 1188 1188
Corn Growing Degree Days
50 M 3 22 113 236 386 517 639 609 465 286 85 5 3366
50 S 3 25 137 374 760 1277 1916 2525 2990 3276 3360 3366 3366
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