PHANTOM RANCH, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(026471) PHANTOM RANCH
From Year=1966 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	226	358	616	846	1166	1416	1590	1503	1259	936	502	233	10651
40 S	226	585	1200	2046	3212	4629	6218	7722	8980	9916	10418	10651	10651
45 M	102	223	462	696	1011	1266	1435	1348	1109	781	354	106	8893
45 S	102	325	787	1483	2494	3761	5195	6544	7652	8433	8787	8893	8893
50 M	26	106	313	547	856	1116	1280	1193	959	626	218	28	7268
50 S	26	132	445	992	1848	2965	4244	5438	6396	7022	7240	7268	7268
55 M	4	32	182	402	701	966	1125	1038	809	473	109	5	5847
55 S	4	36	219	621	1322	2288	3413	4451	5260	5732	5841	5847	5847
60 M	0	5	87	268	547	816	970	883	659	326	40	0	4602
60 S	0	6	92	360	907	1724	2694	3577	4235	4561	4601	4602	4602

Corn Growing Degree Days
50 M	115	198	370	537	744	867	971	936	810	600	281	115	6544
50 S	115	313	683	1220	1964	2831	3802	4738	5549	6149	6430	6544	6544

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 Jul 28, 2006
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