ASPEN, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(050370) ASPEN
From Year=1899 To Year=1979
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 1 5 74 261 480 689 633 408 170 14 0 2734
40 S 0 1 6 80 341 821 1509 2142 2550 2720 2734 2734 2734
45 M 0 0 0 22 135 333 534 478 264 70 2 0 1840
45 S 0 0 1 23 158 492 1025 1503 1768 1838 1840 1840 1840
50 M 0 0 0 3 47 198 379 323 136 16 0 0 1100
50 S 0 0 0 3 50 247 626 949 1085 1100 1100 1100 1100
55 M 0 0 0 0 8 88 224 172 43 1 0 0 537
55 S 0 0 0 0 8 96 320 493 536 537 537 537 537
60 M 0 0 0 0 0 23 85 52 6 0 0 0 166
60 S 0 0 0 0 0 23 108 160 165 166 166 166 166
Corn Growing Degree Days
50 M 1 2 15 86 215 354 463 430 310 174 29 2 2082
50 S 1 3 18 104 319 673 1137 1566 1876 2051 2080 2082 2082
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