TEMPE 1 SE, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(028489) TEMPE
From Year=1926 To Year=1984
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	332	411	594	784	1055	1272	1525	1469	1261	945	552	369	10569
40 S	332	743	1337	2120	3175	4447	5972	7441	8702	9647	10199	10569	10569
45 M	192	273	439	634	900	1122	1370	1314	1111	790	404	224	8773
45 S	192	465	904	1538	2438	3560	4930	6244	7355	8145	8548	8773	8773
50 M	83	151	290	484	745	972	1215	1159	961	635	262	104	7060
50 S	83	234	523	1007	1752	2724	3939	5098	6059	6694	6956	7060	7060
55 M	22	61	160	338	590	822	1060	1004	811	481	140	31	5520
55 S	22	83	242	580	1170	1992	3052	4056	4867	5349	5489	5520	5520
60 M	3	15	65	205	436	672	905	849	661	332	55	5	4204
60 S	3	18	83	289	725	1398	2302	3151	3813	4144	4199	4204	4204

Corn Growing Degree Days
50 M	238	281	389	495	637	743	932	910	773	592	377	264	6631
50 S	238	519	908	1403	2039	2783	3714	4625	5398	5990	6367	6631	6631

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