HEREFORD, TEXAS

Period of Record General Climate Summary - Growing Degree Days

Station:(414098) HEREFORD
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	73	109	265	487	777	1026	1164	1116	863	562	217	80	6738
40 S	73	182	447	934	1711	2737	3901	5017	5880	6441	6658	6738	6738
45 M	27	49	155	349	623	876	1009	961	713	414	119	30	5326
45 S	27	76	231	580	1203	2079	3088	4049	4762	5176	5296	5326	5326
50 M	7	17	75	224	471	726	854	806	565	276	51	8	4081
50 S	7	24	99	323	794	1520	2374	3180	3745	4021	4072	4081	4081
55 M	1	3	29	122	326	576	699	651	419	158	15	1	3001
55 S	1	4	33	155	481	1058	1756	2407	2827	2985	2999	3001	3001
60 M	0	0	8	51	197	428	544	496	281	71	2	0	2078
60 S	0	0	8	60	256	685	1228	1724	2005	2076	2078	2078	2078

Corn Growing Degree Days
50 M	94	116	223	336	488	654	760	728	550	371	184	96	4601
50 S	94	210	433	769	1258	1911	2672	3400	3950	4321	4505	4601	4601

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