HELVETIA SANTA RITA, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(023981) HELVETIA SANTA RITA RAN
From Year=1916 To Year=1950
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	239	284	448	663	912	1148	1223	1143	1049	817	471	301	8699
40 S	239	522	970	1633	2546	3694	4917	6060	7109	7926	8397	8699	8699
45 M	127	166	302	514	757	998	1068	988	899	662	330	173	6986
45 S	127	293	595	1110	1867	2865	3933	4921	5820	6482	6813	6986	6986
50 M	53	78	176	370	603	848	913	833	749	508	206	81	5418
50 S	53	131	307	677	1280	2128	3041	3874	4623	5131	5337	5418	5418
55 M	15	27	81	239	450	698	758	678	599	359	104	26	4035
55 S	15	43	124	362	812	1510	2268	2946	3545	3904	4009	4035	4035
60 M	3	4	24	130	302	548	603	523	449	221	37	4	2849
60 S	3	7	31	161	464	1012	1615	2138	2587	2809	2845	2849	2849

Corn Growing Degree Days
50 M	140	166	264	414	595	748	818	782	712	521	278	172	5609
50 S	140	306	569	984	1578	2326	3144	3926	4638	5159	5437	5609	5609

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