CLIFTON, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(021849) CLIFTON
From Year=1893 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	209	328	542	752	1043	1295	1418	1368	1173	882	452	216	9677
40 S	209	537	1079	1831	2873	4168	5586	6954	8127	9009	9461	9677	9677
45 M	93	198	389	602	888	1145	1263	1213	1023	727	307	98	7945
45 S	93	291	680	1282	2170	3315	4577	5790	6813	7540	7848	7945	7945
50 M	25	93	245	453	733	995	1108	1058	873	573	178	26	6359
50 S	25	118	364	817	1549	2544	3652	4710	5583	6155	6333	6359	6359
55 M	3	30	127	309	578	845	953	903	723	420	80	4	4975
55 S	3	33	160	469	1047	1892	2844	3747	4470	4891	4970	4975	4975
60 M	0	5	48	178	425	695	798	748	573	275	24	0	3770
60 S	0	6	53	231	656	1351	2149	2897	3470	3745	3769	3770	3770

Corn Growing Degree Days
50 M	158	225	352	483	661	796	890	875	760	564	294	158	6217
50 S	158	383	735	1217	1879	2675	3565	4441	5201	5765	6059	6217	6217

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