ZION NP, UTAH

Period of Record General Climate Summary - Growing Degree Days

Station:(429717) ZION NATIONAL PARK
From Year=1904 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	94	174	336	537	838	1120	1351	1286	1044	730	311	114	7935
40 S	94	268	604	1141	1979	3099	4450	5736	6780	7510	7821	7935	7935
45 M	33	85	207	393	683	970	1196	1131	894	577	192	44	6405
45 S	33	117	325	717	1401	2371	3567	4698	5592	6169	6361	6405	6405
50 M	8	32	107	262	530	820	1042	976	744	429	99	12	5059
50 S	8	39	146	408	938	1758	2800	3776	4520	4949	5048	5059	5059
55 M	1	8	42	151	384	670	887	821	595	291	40	2	3891
55 S	1	8	51	202	586	1256	2143	2964	3559	3850	3889	3891	3891
60 M	0	1	11	70	251	521	732	667	447	173	10	0	2882
60 S	0	1	11	81	332	853	1585	2252	2699	2871	2882	2882	2882

Corn Growing Degree Days
50 M	72	118	225	347	536	698	838	811	670	470	206	81	5074
50 S	72	190	415	762	1298	1997	2835	3646	4316	4787	4993	5074	5074

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