Y LIGHTNING RCH, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(029562) Y LIGHTNING RANCH
From Year=1939 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 352 309 535 756 932 1209 1215 1238 1052 839 433 170 9038
40 S 352 661 1195 1951 2883 4092 5308 6545 7597 8436 8868 9038 9038
45 M 203 177 384 607 777 1059 1060 1083 902 684 288 85 7308
45 S 203 380 764 1370 2147 3206 4267 5349 6251 6935 7223 7308 7308
50 M 81 74 245 464 622 909 905 928 752 529 160 36 5703
50 S 81 155 400 863 1485 2394 3299 4227 4979 5508 5668 5703 5703
55 M 10 15 126 325 467 759 750 773 602 375 67 11 4279
55 S 10 25 151 476 943 1702 2452 3225 3826 4202 4268 4279 4279
60 M 0 2 40 192 318 609 595 618 452 235 23 2 3086
60 S 0 2 42 234 552 1161 1756 2374 2826 3061 3083 3086 3086
Corn Growing Degree Days
50 M 282 247 389 492 584 715 794 796 683 544 280 138 5942
50 S 282 529 918 1410 1994 2708 3502 4297 4980 5524 5803 5942 5942
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