LITCHFIELD PARK, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(024977) LITCHFIELD PARK
From Year=1917 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	365	449	645	846	1140	1369	1595	1541	1315	987	587	381	11221
40 S	365	815	1460	2306	3446	4815	6410	7951	9266	10252	10840	11221	11221
45 M	220	311	490	696	985	1219	1440	1386	1165	832	438	233	9414
45 S	220	531	1021	1717	2702	3921	5361	6747	7912	8744	9181	9414	9414
50 M	100	181	337	546	830	1069	1285	1231	1015	677	293	108	7672
50 S	100	282	619	1166	1996	3065	4349	5580	6595	7272	7565	7672	7672
55 M	27	80	197	398	675	919	1130	1076	865	523	162	30	6081
55 S	27	107	304	702	1377	2296	3426	4502	5367	5889	6051	6081	6081
60 M	3	22	89	257	521	769	975	921	715	371	65	4	4711
60 S	3	25	114	371	892	1661	2635	3556	4271	4642	4707	4711	4711

Corn Growing Degree Days
50 M	263	307	425	533	684	796	962	939	799	614	400	272	6995
50 S	263	570	996	1529	2213	3008	3970	4910	5708	6323	6723	6995	6995

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