QUARTZSITE, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(026865) QUARTZSITE
From Year=1959 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	376	479	729	937	1247	1476	1705	1666	1407	1085	610	348	12063
40 S	376	854	1583	2520	3766	5242	6947	8613	10020	11105	11715	12063	12063
45 M	231	339	574	787	1092	1326	1550	1511	1257	930	460	205	10260
45 S	231	569	1143	1930	3021	4347	5897	7409	8665	9595	10055	10260	10260
50 M	112	205	420	637	937	1176	1395	1356	1107	775	316	90	8525
50 S	112	317	737	1374	2311	3487	4881	6238	7344	8119	8435	8525	8525
55 M	37	99	275	487	782	1026	1240	1201	957	620	189	25	6937
55 S	37	136	411	898	1679	2705	3945	5147	6103	6723	6912	6937	6937
60 M	6	34	150	343	627	876	1085	1046	807	467	90	5	5535
60 S	6	41	191	533	1160	2036	3121	4167	4974	5441	5531	5535	5535

Corn Growing Degree Days
50 M	245	302	459	591	788	905	1056	1043	883	688	387	232	7577
50 S	245	547	1006	1597	2385	3290	4345	5388	6271	6959	7346	7577	7577

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