ALAMOSA SAN LUIS AP, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(050130) ALAMOSA WSO AP
From Year=1948 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 0 1 16 108 343 595 772 702 452 154 7 0 3150
40 S 0 1 17 125 468 1063 1835 2538 2990 3143 3150 3150 3150
45 M 0 0 2 37 204 445 617 547 305 61 1 0 2219
45 S 0 0 2 39 243 689 1306 1853 2158 2219 2219 2219 2219
50 M 0 0 0 6 93 297 462 392 166 13 0 0 1431
50 S 0 0 0 7 99 397 859 1251 1418 1431 1431 1431 1431
55 M 0 0 0 0 25 161 307 238 59 1 0 0 791
55 S 0 0 0 0 25 186 493 731 790 791 791 791 791
60 M 0 0 0 0 3 57 155 96 9 0 0 0 320
60 S 0 0 0 0 3 60 215 311 320 320 320 320 320
Corn Growing Degree Days
50 M 3 11 59 151 291 428 506 467 354 206 46 4 2525
50 S 3 13 72 223 513 941 1447 1915 2269 2475 2521 2525 2525
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