PRESCOTT, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(026796) PRESCOTT
From Year=1898 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 36 64 157 321 559 820 1030 961 753 456 157 42 5356
40 S 36 100 257 579 1137 1957 2987 3949 4701 5157 5314 5356 5356
45 M 6 17 68 192 407 670 875 806 603 309 66 8 4027
45 S 6 23 91 283 690 1360 2235 3042 3644 3953 4019 4027 4027
50 M 1 2 20 91 264 520 720 651 453 178 17 1 2917
50 S 1 3 22 114 378 898 1618 2269 2722 2900 2917 2917 2917
55 M 0 0 3 31 141 372 565 496 306 78 2 0 1995
55 S 0 0 3 34 176 548 1113 1609 1916 1993 1995 1995 1995
60 M 0 0 0 6 55 233 410 342 171 22 0 0 1239
60 S 0 0 0 6 62 295 705 1046 1217 1239 1239 1239 1239
Corn Growing Degree Days
50 M 61 86 156 256 394 532 660 625 494 343 168 71 3845
50 S 61 147 303 559 952 1484 2144 2769 3263 3606 3774 3845 3845
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 Jul 28, 2006
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