PLAINS, TEXAS

Period of Record General Climate Summary - Growing Degree Days

Station:(417074) PLAINS
From Year=1925 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	104	155	342	574	870	1082	1186	1146	913	627	276	121	7396
40 S	104	259	602	1175	2045	3127	4313	5459	6372	6998	7274	7396	7396
45 M	44	77	218	429	715	932	1031	991	763	475	165	51	5891
45 S	44	120	338	768	1483	2414	3446	4437	5200	5675	5839	5891	5891
50 M	13	31	117	294	561	782	876	836	614	330	80	15	4548
50 S	13	44	161	455	1015	1797	2673	3509	4123	4453	4533	4548	4548
55 M	2	8	49	174	410	632	721	681	466	200	26	3	3372
55 S	2	11	59	233	644	1275	1997	2677	3143	3343	3369	3372	3372
60 M	0	1	13	83	268	482	566	526	323	97	5	0	2366
60 S	0	2	15	98	367	849	1415	1941	2264	2361	2365	2366	2366

Corn Growing Degree Days
50 M	121	153	267	389	547	687	767	742	585	411	222	134	5026
50 S	121	274	541	930	1477	2164	2931	3673	4259	4670	4892	5026	5026

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