LITTLETON, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(055056) LITTLETON
From Year=1978 To Year=1994
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 19 47 123 295 513 788 976 906 634 307 85 23 4718
40 S 19 66 190 485 998 1786 2762 3669 4302 4610 4695 4718 4718
45 M 4 15 56 180 367 638 821 751 487 184 37 6 3548
45 S 4 20 76 255 622 1261 2082 2833 3320 3504 3541 3548 3548
50 M 1 3 21 94 235 489 666 596 346 86 12 1 2551
50 S 1 4 25 119 354 843 1510 2106 2452 2538 2550 2551 2551
55 M 0 0 6 39 125 343 511 442 216 27 2 0 1712
55 S 0 0 6 45 171 514 1025 1467 1684 1710 1712 1712 1712
60 M 0 0 1 12 49 209 357 290 108 4 0 0 1030
60 S 0 0 1 13 62 270 628 918 1026 1030 1030 1030 1030
Corn Growing Degree Days
50 M 40 61 114 208 312 489 630 581 397 240 92 43 3206
50 S 40 101 214 422 734 1224 1854 2435 2831 3071 3164 3206 3206
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