NATURAL BRG, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(025825) NATURAL BRIDGE
From Year=1893 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	93	145	266	449	713	962	1144	1073	904	635	298	126	6809
40 S	93	239	504	953	1666	2627	3772	4845	5749	6385	6682	6809	6809
45 M	28	61	143	306	558	812	989	918	754	482	170	46	5267
45 S	28	89	232	538	1096	1908	2897	3816	4570	5052	5221	5267	5267
50 M	5	16	58	179	407	662	834	763	604	332	73	9	3941
50 S	5	20	78	256	663	1325	2159	2923	3527	3859	3932	3941	3941
55 M	0	2	15	81	263	512	679	608	454	195	21	1	2831
55 S	0	2	17	98	361	873	1552	2160	2615	2810	2831	2831	2831
60 M	0	0	2	24	138	364	524	453	306	87	4	0	1902
60 S	0	0	2	26	164	528	1052	1506	1811	1898	1902	1902	1902

Corn Growing Degree Days
50 M	77	109	189	290	449	620	759	725	590	388	193	93	4483
50 S	77	186	375	666	1115	1735	2494	3219	3809	4197	4390	4483	4483

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