WILLIAMS CK HATCHERY, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(029367) WILLIAMS CREEK FISH HAT
From Year=1961 To Year=1975
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 67 40 154 239 460 -99 1027 -99 646 -99 92 12 -99
40 S 67 106 260 499 959 -99 -99 -99 -99 -99 -99 -99 -99
45 M 13 5 69 115 308 -99 872 -99 496 -99 26 3 -99
45 S 13 17 86 201 509 -99 -99 -99 -99 -99 -99 -99 -99
50 M 0 0 25 40 172 -99 717 -99 348 -99 1 0 -99
50 S 0 0 25 65 238 -99 -99 -99 -99 -99 -99 -99 -99
55 M 0 0 3 9 63 -99 562 -99 222 -99 0 0 -99
55 S 0 0 3 12 75 -99 -99 -99 -99 -99 -99 -99 -99
60 M 0 0 0 0 10 -99 407 -99 122 -99 0 0 -99
60 S 0 0 0 0 10 -99 -99 -99 -99 -99 -99 -99 -99
Corn Growing Degree Days
50 M 60 38 164 198 324 -99 647 -99 402 -99 80 13 -99
50 S 60 98 261 459 782 -99 -99 -99 -99 -99 -99 -99 -99
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