JOHN MARTIN DAM, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(054388) JOHN MARTIN DAM
From Year=1941 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 23 53 183 418 712 996 1202 1131 830 485 131 26 6191
40 S 23 76 259 678 1390 2386 3587 4718 5548 6033 6165 6191 6191
45 M 6 18 98 286 560 846 1047 976 681 343 58 6 4923
45 S 6 23 121 407 967 1812 2859 3835 4516 4859 4917 4923 4923
50 M 1 4 43 172 412 696 892 821 534 217 18 1 3809
50 S 1 5 47 219 632 1327 2219 3040 3573 3790 3808 3809 3809
55 M 0 1 14 87 275 547 737 666 390 115 3 0 2832
55 S 0 1 15 101 376 923 1659 2325 2715 2830 2832 2832 2832
60 M 0 0 3 33 159 400 582 511 256 48 0 0 1993
60 S 0 0 4 37 195 596 1177 1689 1945 1993 1993 1993 1993
Corn Growing Degree Days
50 M 51 83 177 299 448 617 750 711 522 352 144 53 4208
50 S 51 133 311 610 1058 1675 2425 3136 3659 4011 4154 4208 4208
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