ARIVACA, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(020380) ARIVACA 1 E
From Year=1899 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	231	330	516	541	723	1213	1283	1167	1001	767	523	340	8635
40 S	231	561	1077	1618	2341	3554	4837	6005	7005	7772	8295	8635	8635
45 M	122	197	367	393	568	1063	1128	1012	851	612	373	191	6876
45 S	122	319	685	1078	1646	2709	3837	4850	5700	6312	6685	6876	6876
50 M	44	100	226	251	413	913	973	857	701	457	227	76	5238
50 S	44	144	370	621	1034	1947	2920	3778	4478	4935	5162	5238	5238
55 M	6	35	114	126	259	763	818	702	551	305	107	28	3813
55 S	6	41	155	281	539	1302	2120	2823	3373	3678	3785	3813	3813
60 M	0	5	41	40	121	613	663	547	401	170	31	6	2636
60 S	0	5	46	85	206	819	1482	2029	2430	2599	2630	2636	2636

Corn Growing Degree Days
50 M	176	252	352	388	490	710	784	734	628	513	386	333	5746
50 S	176	428	780	1168	1658	2368	3152	3886	4514	5028	5413	5746	5746

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