YUMA DATE ORCHARD, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(029653) YUMA DATE ORCHARD
From Year=1905 To Year=1929
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	387	461	650	791	1009	1201	1458	1451	1230	912	584	378	10513
40 S	387	848	1498	2289	3298	4499	5957	7408	8638	9550	10134	10513	10513
45 M	241	321	495	641	854	1051	1303	1296	1080	757	435	230	8704
45 S	241	562	1057	1698	2552	3603	4906	6202	7282	8039	8474	8704	8704
50 M	113	190	341	491	699	901	1148	1141	930	603	289	105	6950
50 S	113	302	643	1135	1834	2735	3883	5023	5954	6556	6845	6950	6950
55 M	33	83	197	342	545	751	993	986	780	448	157	31	5346
55 S	33	116	313	655	1200	1951	2944	3930	4710	5158	5315	5346	5346
60 M	4	23	87	202	391	601	838	831	630	300	59	3	3969
60 S	4	27	114	315	706	1307	2145	2975	3606	3906	3965	3969	3969

Corn Growing Degree Days
50 M	286	327	441	507	607	691	876	875	732	575	414	273	6603
50 S	286	613	1054	1561	2168	2859	3735	4610	5342	5917	6331	6603	6603

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