LITTLEFIELD, TEXAS

Period of Record General Climate Summary - Growing Degree Days

Station:(415263) LITTLEFIELD
From Year=1916 To Year=1966
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	85	156	269	574	887	1091	1209	1176	940	643	289	143	7460
40 S	85	241	509	1083	1970	3061	4270	5445	6385	7028	7317	7460	7460
45 M	31	79	159	429	732	941	1054	1021	790	490	176	61	5962
45 S	31	110	269	698	1430	2371	3424	4445	5234	5725	5900	5962	5962
50 M	8	32	76	296	577	791	899	866	640	344	85	20	4634
50 S	8	40	117	413	990	1781	2679	3545	4184	4528	4614	4634	4634
55 M	1	10	28	177	425	641	744	711	490	209	27	5	3466
55 S	1	11	39	216	641	1282	2026	2737	3226	3435	3461	3466	3466
60 M	0	3	7	88	281	492	589	556	342	101	4	0	2462
60 S	0	3	9	98	379	871	1459	2015	2357	2458	2462	2462	2462

Corn Growing Degree Days
50 M	107	151	231	388	557	697	781	762	601	409	224	145	5053
50 S	107	257	488	876	1434	2131	2912	3674	4275	4683	4907	5053	5053

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