ALPINE, TEXAS

Period of Record General Climate Summary - Growing Degree Days

Station:(410174) ALPINE
From Year=1900 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	242	299	488	696	945	1105	1138	1110	928	733	416	268	8368
40 S	242	541	1029	1725	2670	3775	4914	6023	6951	7684	8099	8368	8368
45 M	134	186	345	548	790	955	983	955	778	579	282	154	6689
45 S	134	320	664	1213	2002	2958	3941	4896	5674	6253	6535	6689	6689
50 M	60	97	215	404	635	805	828	800	628	428	168	71	5140
50 S	60	157	371	775	1410	2215	3044	3844	4472	4900	5068	5140	5140
55 M	20	38	110	267	482	655	673	645	480	284	80	24	3758
55 S	20	58	168	435	917	1572	2245	2890	3370	3654	3734	3758	3758
60 M	3	9	41	149	332	505	518	490	334	157	24	4	2568
60 S	3	13	54	202	534	1040	1558	2048	2382	2539	2564	2568	2568

Corn Growing Degree Days
50 M	183	217	335	461	611	719	761	743	609	472	280	195	5586
50 S	183	399	735	1196	1807	2526	3287	4030	4639	5111	5391	5586	5586

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