CASA GRANDE, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(021306) CASA GRANDE
From Year=1898 To Year=2009
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	350	429	636	839	1132	1365	1588	1524	1307	980	577	358	11086
40 S	350	778	1415	2254	3385	4750	6339	7863	9170	10150	10728	11086	11086
45 M	208	291	482	689	977	1215	1433	1369	1157	825	429	213	9289
45 S	208	499	981	1670	2647	3862	5295	6665	7822	8647	9076	9289	9289
50 M	95	167	331	539	822	1065	1278	1214	1007	670	286	96	7571
50 S	95	262	593	1132	1953	3019	4297	5511	6518	7189	7475	7571	7571
55 M	29	73	196	391	667	915	1123	1059	857	516	161	28	6016
55 S	29	102	298	689	1356	2271	3395	4454	5311	5827	5988	6016	6016
60 M	4	22	91	254	512	765	968	904	707	366	69	4	4667
60 S	4	26	117	371	883	1648	2617	3521	4228	4594	4663	4667	4667

Corn Growing Degree Days
50 M	262	303	426	529	674	788	958	935	798	615	401	270	6959
50 S	262	565	991	1520	2194	2982	3940	4875	5673	6288	6689	6959	6959

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