PHOENIX CITY, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(026486) PHOENIX CITY
From Year=1948 To Year=1998
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	457	524	717	934	1222	1455	1639	1594	1390	1108	685	478	12203
40 S	457	981	1698	2632	3854	5309	6948	8541	9931	11040	11725	12203	12203
45 M	307	384	563	784	1067	1305	1484	1439	1240	953	536	327	10388
45 S	307	691	1254	2038	3104	4409	5893	7332	8572	9525	10061	10388	10388
50 M	171	250	409	634	912	1155	1329	1284	1090	798	388	187	8607
50 S	171	422	831	1465	2377	3532	4861	6144	7234	8032	8420	8607	8607
55 M	68	135	265	485	757	1005	1174	1129	940	644	250	77	6927
55 S	68	203	468	953	1710	2715	3888	5017	5957	6601	6851	6927	6927
60 M	16	53	141	342	602	855	1019	974	790	491	133	17	5432
60 S	16	69	210	552	1154	2009	3028	4002	4791	5282	5415	5432	5432

Corn Growing Degree Days
50 M	263	312	438	599	784	901	1033	1013	888	718	425	280	7654
50 S	263	575	1013	1612	2396	3297	4330	5342	6231	6949	7373	7654	7654

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