DOUGLAS, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(022659) DOUGLAS
From Year=1948 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	282	453	626	883	1116	1229	1160	998	730	388	212	8285
40 S	209	490	944	1570	2453	3569	4798	5957	6956	7686	8074	8285	8285
45 M	92	157	304	477	728	966	1074	1005	848	575	248	98	6573
45 S	92	250	554	1031	1759	2724	3798	4803	5652	6227	6475	6573	6573
50 M	25	64	173	331	573	816	919	850	698	423	128	30	5030
50 S	25	89	262	593	1167	1982	2901	3751	4449	4872	5000	5030	5030
55 M	3	15	77	196	420	666	764	695	548	275	44	4	3707
55 S	3	19	95	291	711	1376	2140	2835	3383	3658	3702	3707	3707
60 M	0	2	23	86	269	516	609	540	398	142	9	0	2595
60 S	0	2	25	111	381	896	1505	2045	2444	2586	2595	2595	2595

Corn Growing Degree Days
50 M	203	242	348	447	570	673	786	758	645	495	312	208	5688
50 S	203	445	793	1240	1810	2484	3270	4028	4673	5167	5480	5688	5688

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