SAN SIMON, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(027560) SAN SIMON
From Year=1898 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	151	233	409	621	886	1136	1287	1228	1034	726	341	148	8201
40 S	151	384	794	1415	2301	3437	4724	5951	6986	7712	8053	8201	8201
45 M	55	119	263	472	731	986	1132	1073	884	572	207	55	6547
45 S	55	174	436	908	1639	2625	3757	4830	5714	6286	6492	6547	6547
50 M	12	42	139	325	576	836	977	918	734	420	99	11	5088
50 S	12	54	192	518	1094	1929	2906	3824	4558	4979	5078	5088	5088
55 M	2	8	53	191	423	686	822	763	584	275	33	1	3842
55 S	2	10	63	254	677	1363	2185	2948	3532	3807	3841	3842	3842
60 M	0	1	12	85	274	536	667	608	435	147	7	0	2771
60 S	0	1	13	99	373	909	1576	2183	2618	2765	2771	2771	2771

Corn Growing Degree Days
50 M	166	219	335	451	565	660	790	778	648	494	284	161	5552
50 S	166	385	720	1170	1735	2395	3186	3964	4612	5106	5391	5552	5552

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