RAMONA FIRE DEPT, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047228) RAMONA FIRE DEPT
From Year=1974 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	390	369	451	533	695	832	1020	1053	946	752	517	377	7935
40 S	390	759	1209	1742	2438	3270	4290	5343	6288	7041	7558	7935	7935
45 M	240	231	297	383	540	682	865	898	796	597	368	229	6128
45 S	240	471	768	1152	1692	2374	3239	4137	4933	5530	5898	6128	6128
50 M	116	114	159	240	385	532	710	743	646	443	226	107	4420
50 S	116	230	388	628	1014	1546	2256	2999	3645	4087	4313	4420	4420
55 M	40	42	61	119	236	382	555	588	496	290	108	36	2952
55 S	40	82	143	262	498	881	1436	2024	2519	2809	2917	2952	2952
60 M	9	10	15	40	113	236	400	433	347	154	35	8	1800
60 S	9	20	35	75	187	423	824	1256	1603	1757	1792	1800	1800

Corn Growing Degree Days
50 M	264	245	282	338	421	514	641	659	584	473	345	272	5038
50 S	264	510	791	1130	1550	2064	2705	3364	3948	4422	4766	5038	5038

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