ALPINE, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(040136) ALPINE
From Year=1952 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	426	417	491	582	719	875	1092	1117	1011	840	572	429	8571
40 S	426	843	1334	1916	2636	3511	4603	5719	6730	7570	8142	8571	8571
45 M	277	279	337	432	564	725	937	962	861	685	423	280	6761
45 S	277	556	893	1325	1890	2615	3551	4513	5374	6059	6481	6761	6761
50 M	150	154	196	287	410	575	782	807	711	531	278	151	5030
50 S	150	305	500	787	1197	1772	2554	3360	4071	4601	4879	5030	5030
55 M	64	68	91	161	260	425	627	652	561	378	154	60	3499
55 S	64	132	223	384	643	1068	1695	2347	2907	3285	3439	3499	3499
60 M	20	24	31	72	133	280	472	497	411	235	67	16	2258
60 S	20	44	75	147	280	560	1032	1528	1939	2174	2242	2258	2258

Corn Growing Degree Days
50 M	241	240	283	345	431	544	703	723	644	525	338	245	5263
50 S	241	481	764	1109	1540	2084	2787	3510	4154	4679	5017	5263	5263

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 Jul 28, 2006
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