ELK VALLEY, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(042749) ELK VALLEY
From Year=1938 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	44	72	133	262	454	617	806	763	590	338	123	60	4263
40 S	44	116	249	512	966	1583	2389	3151	3741	4079	4203	4263	4263
45 M	11	20	47	139	305	467	651	608	440	195	44	16	2941
45 S	11	31	78	217	522	989	1639	2247	2687	2881	2925	2941	2941
50 M	2	3	10	53	172	319	496	453	293	81	9	2	1893
50 S	2	5	15	68	240	559	1055	1507	1800	1881	1890	1893	1893
55 M	0	0	1	12	74	185	342	299	158	20	1	0	1093
55 S	0	0	1	14	88	273	615	914	1072	1092	1093	1093	1093
60 M	0	0	0	1	22	86	196	158	59	3	0	0	525
60 S	0	0	0	1	23	109	305	463	522	525	525	525	525

Corn Growing Degree Days
50 M	14	40	100	197	316	398	515	498	406	220	54	16	2775
50 S	14	54	154	351	667	1066	1581	2079	2485	2705	2759	2775	2775

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