GRAND CANYON NP 2, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(023596) GRAND CANYON N P 2
From Year=1976 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 6 13 60 179 407 670 858 797 582 290 67 9 3937
40 S 6 19 78 257 664 1335 2193 2989 3571 3861 3928 3937 3937
45 M 0 1 15 81 265 521 703 642 433 163 20 1 2843
45 S 0 1 16 97 362 882 1586 2227 2660 2823 2842 2843 2843
50 M 0 0 2 24 143 373 548 487 287 69 3 0 1935
50 S 0 0 2 26 169 542 1090 1577 1864 1933 1935 1935 1935
55 M 0 0 0 3 58 231 393 332 153 19 0 0 1190
55 S 0 0 0 4 61 293 686 1018 1171 1189 1190 1190 1190
60 M 0 0 0 0 16 109 239 182 52 2 0 0 602
60 S 0 0 0 0 16 126 365 547 600 602 602 602 602
Corn Growing Degree Days
50 M 19 27 81 175 322 469 548 507 390 232 79 24 2873
50 S 19 46 127 302 623 1092 1641 2147 2538 2770 2849 2873 2873
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