ALPINE, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(020159) ALPINE
From Year=1904 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	3	7	30	102	272	501	663	604	425	190	31	3	2831
40 S	3	10	39	142	414	914	1577	2181	2606	2797	2827	2831	2831
45 M	0	1	5	30	138	351	508	449	276	75	3	0	1837
45 S	0	1	6	36	174	526	1034	1482	1759	1834	1837	1837	1837
50 M	0	0	1	5	47	209	353	294	138	17	0	0	1063
50 S	0	0	1	6	53	261	615	908	1046	1063	1063	1063	1063
55 M	0	0	0	0	9	91	199	142	39	2	0	0	483
55 S	0	0	0	0	10	100	300	442	481	483	483	483	483
60 M	0	0	0	0	1	23	65	30	4	0	0	0	124
60 S	0	0	0	0	1	24	90	120	123	124	124	124	124

Corn Growing Degree Days
50 M	23	29	74	155	282	406	437	393	325	212	91	34	2460
50 S	23	52	126	281	563	969	1406	1798	2123	2335	2426	2460	2460

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