SELLS, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(027726) SELLS
From Year=1911 To Year=2009
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	360	406	573	768	1023	1280	1440	1371	1240	955	595	386	10398
40 S	360	766	1339	2108	3131	4410	5850	7222	8462	9417	10012	10398	10398
45 M	221	272	420	618	868	1130	1285	1216	1090	800	446	243	8610
45 S	221	493	913	1531	2399	3529	4814	6030	7120	7920	8367	8610	8610
50 M	108	155	275	469	713	980	1130	1061	940	646	305	123	6906
50 S	108	263	538	1008	1720	2700	3830	4892	5831	6477	6783	6906	6906
55 M	36	70	150	326	558	830	975	906	790	493	181	43	5357
55 S	36	106	256	582	1140	1970	2945	3851	4641	5134	5315	5357	5357
60 M	7	21	60	196	406	680	820	751	640	343	85	8	4018
60 S	7	28	89	285	690	1370	2190	2942	3581	3925	4010	4018	4018

Corn Growing Degree Days
50 M	251	276	378	488	629	766	901	874	773	602	390	266	6594
50 S	251	527	905	1393	2023	2788	3689	4563	5336	5938	6328	6594	6594

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