LITTLEFIELD, TEXAS

Period of Record General Climate Summary - Growing Degree Days

Station:(415265) LITTLEFIELD
From Year=1966 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	96	144	326	553	849	1078	1196	1136	890	606	273	109	7256
40 S	96	240	566	1119	1967	3045	4241	5377	6268	6874	7147	7256	7256
45 M	38	72	205	410	694	928	1041	981	741	456	165	47	5779
45 S	38	110	315	725	1420	2348	3388	4370	5110	5567	5732	5779	5779
50 M	11	28	110	278	541	778	886	826	592	315	83	14	4461
50 S	11	39	149	427	968	1746	2632	3458	4050	4365	4447	4461	4461
55 M	2	7	48	164	391	628	731	671	445	190	30	2	3310
55 S	2	9	57	221	612	1240	1971	2643	3088	3277	3308	3310	3310
60 M	0	1	15	79	253	479	576	517	304	91	7	0	2321
60 S	0	1	16	95	348	827	1402	1919	2223	2314	2321	2321	2321

Corn Growing Degree Days
50 M	115	146	259	372	531	688	782	748	570	394	211	118	4934
50 S	115	261	520	892	1423	2111	2893	3640	4210	4604	4815	4934	4934

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