RAMONA FIRE DEPT, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047228) RAMONA FIRE DEPT
From Year=1974 To Year=2008
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	384	368	455	534	698	842	1030	1062	948	754	526	377	7978
40 S	384	753	1207	1742	2440	3281	4312	5374	6322	7076	7602	7978	7978
45 M	235	231	301	385	543	692	875	907	798	599	377	228	6171
45 S	235	466	767	1151	1695	2386	3262	4169	4967	5566	5943	6171	6171
50 M	112	113	162	241	388	542	720	752	648	444	235	107	4464
50 S	112	226	387	629	1017	1559	2279	3031	3679	4123	4358	4464	4464
55 M	39	41	63	120	239	392	565	597	498	291	115	35	2996
55 S	39	80	143	263	502	893	1459	2056	2554	2845	2960	2996	2996
60 M	9	10	16	40	115	245	410	442	350	154	39	8	1838
60 S	9	19	34	75	190	435	845	1287	1637	1791	1830	1838	1838

Corn Growing Degree Days
50 M	261	245	286	338	422	519	648	667	586	474	349	272	5067
50 S	261	506	792	1130	1553	2072	2719	3386	3972	4446	4795	5067	5067

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