SAN LUIS 1S, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(057430) SAN LUIS 1 E
From Year=1980 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 1 1 32 125 332 574 725 664 451 159 19 0 3084
40 S 1 2 34 159 491 1066 1790 2455 2906 3064 3084 3084 3084
45 M 0 0 7 47 197 425 570 509 305 63 3 0 2126
45 S 0 0 7 54 251 676 1246 1755 2059 2122 2126 2126 2126
50 M 0 0 1 9 91 278 415 355 167 14 0 0 1329
50 S 0 0 1 10 101 379 794 1148 1315 1329 1329 1329 1329
55 M 0 0 0 0 27 147 260 202 61 2 0 0 698
55 S 0 0 0 0 27 174 434 636 697 698 698 698 698
60 M 0 0 0 0 5 50 114 67 11 0 0 0 247
60 S 0 0 0 0 5 54 169 236 247 247 247 247 247
Corn Growing Degree Days
50 M 3 7 51 140 272 409 478 435 339 180 44 4 2363
50 S 3 10 61 201 474 883 1361 1796 2135 2315 2359 2363 2363
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