ZION NATIONAL PARK, UTAH

Period of Record General Climate Summary - Growing Degree Days

Station:(429717) ZION NATIONAL PARK
From Year=1928 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 99 173 334 547 856 1126 1366 1306 1057 734 312 119 8029
40 S 99 272 605 1152 2008 3134 4501 5806 6863 7598 7910 8029 8029
45 M 35 85 206 403 702 976 1212 1151 907 581 194 46 6497
45 S 35 121 326 729 1431 2407 3618 4769 5676 6257 6451 6497 6497
50 M 8 32 107 271 549 826 1057 996 757 433 101 12 5148
50 S 8 40 147 419 967 1793 2850 3845 4603 5035 5136 5148 5148
55 M 1 8 42 158 401 676 902 841 608 295 40 1 3973
55 S 1 8 50 209 610 1286 2188 3029 3636 3931 3971 3973 3973
60 M 0 1 10 73 265 527 747 686 459 176 10 0 2954
60 S 0 1 11 84 349 876 1623 2309 2768 2944 2954 2954 2954
Corn Growing Degree Days
50 M 69 114 221 352 548 701 845 822 680 468 200 79 5097
50 S 69 183 404 756 1304 2005 2850 3672 4352 4819 5019 5097 5097
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