PORTALES, NEW MEXICO

Period of Record General Climate Summary - Growing Degree Days

Station:(297008) PORTALES
From Year=1905 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	83	137	312	536	833	1051	1172	1123	892	594	243	88	7064
40 S	83	220	532	1068	1901	2952	4124	5247	6139	6733	6976	7064	7064
45 M	29	63	189	391	679	901	1017	968	742	443	134	32	5589
45 S	29	92	281	672	1351	2252	3269	4237	4979	5422	5557	5589	5589
50 M	8	20	93	257	525	751	862	813	593	300	58	8	4286
50 S	8	28	120	377	902	1653	2515	3328	3920	4220	4278	4286	4286
55 M	1	4	34	142	374	601	707	658	445	173	16	1	3156
55 S	1	5	38	180	555	1156	1863	2521	2966	3139	3155	3156	3156
60 M	0	0	8	60	234	452	552	503	302	77	2	0	2189
60 S	0	0	8	68	302	754	1306	1809	2110	2188	2189	2189	2189

Corn Growing Degree Days
50 M	111	150	266	379	533	666	760	732	577	402	211	112	4900
50 S	111	261	527	906	1438	2105	2865	3597	4174	4577	4788	4900	4900

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