MORRO BAY FIRE DEPT, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(045866) MORRO BAY FIRE DEPT
From Year=1959 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	391	381	432	442	486	525	596	620	612	613	500	389	5988
40 S	391	772	1204	1646	2132	2657	3253	3873	4486	5099	5599	5988	5988
45 M	239	241	277	292	331	375	441	465	462	458	350	237	4170
45 S	239	480	757	1050	1381	1756	2197	2662	3124	3583	3933	4170	4170
50 M	108	114	134	149	178	225	286	310	312	303	204	106	2430
50 S	108	222	356	505	683	908	1194	1504	1816	2120	2323	2430	2430
55 M	31	34	41	50	54	83	132	156	163	156	86	28	1014
55 S	31	65	107	157	211	293	426	581	744	901	987	1014	1014
60 M	6	6	8	14	10	13	28	36	54	58	25	4	264
60 S	6	12	20	35	45	58	86	123	177	235	260	264	264

Corn Growing Degree Days
50 M	197	187	208	215	220	241	291	313	317	325	262	198	2975
50 S	197	384	592	808	1028	1269	1561	1874	2191	2516	2778	2975	2975

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