ALPINE, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(040136) ALPINE
From Year=1952 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	431	411	490	580	717	867	1086	1115	1013	838	572	425	8546
40 S	431	843	1332	1912	2629	3496	4582	5697	6710	7548	8120	8546	8546
45 M	282	273	336	430	562	717	931	960	863	683	422	276	6736
45 S	282	555	891	1321	1882	2600	3531	4491	5354	6037	6459	6736	6736
50 M	154	150	194	284	407	567	776	805	713	528	278	148	5005
50 S	154	304	499	783	1190	1758	2534	3339	4052	4580	4858	5005	5005
55 M	67	66	90	159	257	418	621	650	563	375	154	59	3479
55 S	67	132	223	381	638	1056	1677	2327	2890	3266	3420	3479	3479
60 M	21	23	31	71	130	272	466	495	414	233	68	16	2240
60 S	21	44	75	146	276	548	1014	1509	1923	2156	2225	2240	2240

Corn Growing Degree Days
50 M	244	236	282	342	428	539	700	723	647	522	338	242	5243
50 S	244	480	762	1104	1532	2071	2771	3494	4141	4664	5001	5243	5243

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