WELLTON, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(029211) WELLTON
From Year=1922 To Year=1980
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	348	450	653	831	1098	1310	1581	1551	1319	995	569	367	11073
40 S	348	798	1451	2282	3380	4690	6271	7822	9141	10136	10705	11073	11073
45 M	204	311	498	681	943	1160	1426	1396	1169	840	420	220	9267
45 S	204	515	1013	1694	2637	3797	5223	6619	7788	8628	9048	9267	9267
50 M	90	180	344	531	788	1010	1271	1241	1019	685	275	96	7531
50 S	90	271	615	1146	1934	2944	4215	5456	6475	7160	7435	7531	7531
55 M	25	78	199	382	633	860	1116	1086	869	531	148	27	5953
55 S	25	103	302	684	1317	2177	3293	4379	5248	5778	5926	5953	5953
60 M	3	22	87	239	478	710	961	931	719	378	58	4	4591
60 S	3	25	113	352	830	1540	2502	3432	4151	4529	4587	4591	4591

Corn Growing Degree Days
50 M	277	329	440	522	658	769	963	956	802	617	409	292	7033
50 S	277	606	1046	1568	2226	2996	3958	4914	5716	6333	6742	7033	7033

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