PRESCOTT, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(026796) PRESCOTT
From Year=1898 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	36	64	160	324	564	826	1035	967	757	458	159	42	5392
40 S	36	100	260	584	1148	1974	3009	3976	4733	5191	5350	5392	5392
45 M	6	17	70	195	412	676	880	812	607	311	67	8	4062
45 S	6	23	93	288	700	1376	2256	3068	3675	3986	4054	4062	4062
50 M	1	2	21	94	269	526	725	657	457	180	18	1	2949
50 S	1	3	23	117	386	912	1637	2294	2751	2931	2949	2949	2949
55 M	0	0	3	32	146	378	570	502	310	79	2	0	2023
55 S	0	0	3	36	182	560	1130	1632	1942	2021	2023	2023	2023
60 M	0	0	0	6	59	238	415	348	174	23	0	0	1263
60 S	0	0	0	7	65	303	719	1066	1240	1263	1263	1263	1263

Corn Growing Degree Days
50 M	61	86	158	257	396	535	664	629	496	344	169	70	3866
50 S	61	147	304	561	957	1492	2156	2786	3282	3626	3796	3866	3866

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