QUARTZSITE, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(026865) QUARTZSITE
From Year=1908 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	356	456	710	917	1229	1456	1694	1649	1386	1035	592	342	11822
40 S	356	811	1521	2438	3667	5124	6818	8467	9853	10888	11480	11822	11822
45 M	213	317	555	767	1074	1306	1539	1494	1236	880	443	201	10026
45 S	213	530	1085	1852	2926	4233	5772	7266	8502	9382	9825	10026	10026
50 M	100	187	401	617	919	1156	1384	1339	1086	725	299	89	8304
50 S	100	287	688	1306	2225	3381	4766	6105	7191	7916	8215	8304	8304
55 M	32	85	257	468	764	1006	1229	1184	936	571	173	26	6731
55 S	32	117	374	842	1606	2612	3842	5026	5962	6532	6705	6731	6731
60 M	7	26	136	324	609	856	1074	1029	786	419	79	5	5350
60 S	7	33	169	493	1102	1959	3033	4062	4848	5267	5346	5350	5350

Corn Growing Degree Days
50 M	248	300	459	578	759	878	1036	1017	854	653	391	236	7409
50 S	248	548	1006	1584	2344	3221	4258	5275	6129	6782	7173	7409	7409

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