PHANTOM RCH, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(026471) PHANTOM RANCH
From Year=1966 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	223	351	616	841	1164	1412	1587	1500	1257	927	503	229	10610
40 S	223	573	1189	2030	3194	4607	6194	7693	8951	9878	10381	10610	10610
45 M	98	216	462	691	1009	1262	1432	1345	1107	772	356	103	8854
45 S	98	315	777	1468	2477	3739	5171	6516	7623	8395	8751	8854	8854
50 M	25	101	313	542	854	1112	1277	1190	957	617	219	28	7235
50 S	25	126	439	981	1835	2947	4224	5413	6371	6988	7207	7235	7235
55 M	4	30	182	397	699	962	1122	1035	807	464	110	5	5817
55 S	4	34	216	613	1312	2274	3396	4430	5238	5702	5812	5817	5817
60 M	0	5	86	262	545	812	967	880	657	317	41	0	4573
60 S	0	5	91	353	898	1710	2677	3557	4214	4531	4572	4573	4573

Corn Growing Degree Days
50 M	115	195	371	533	741	862	971	934	808	594	283	113	6521
50 S	115	311	682	1216	1956	2818	3790	4723	5531	6125	6408	6521	6521

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