LA MESA, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(044735) LA MESA
From Year=1899 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	476	470	550	626	738	817	994	1034	960	841	628	515	8648
40 S	476	946	1496	2122	2860	3677	4671	5704	6665	7505	8133	8648	8648
45 M	323	329	395	476	583	667	839	879	810	686	478	360	6824
45 S	323	652	1047	1523	2106	2773	3611	4490	5300	5986	6464	6824	6824
50 M	180	194	242	326	428	517	684	724	660	531	329	212	5025
50 S	180	373	616	942	1370	1887	2570	3294	3954	4485	4814	5025	5025
55 M	71	82	109	183	274	367	529	569	510	376	186	90	3345
55 S	71	153	262	445	719	1086	1614	2183	2693	3069	3255	3345	3345
60 M	18	23	32	74	131	218	374	414	360	226	76	23	1968
60 S	18	41	73	147	278	496	870	1283	1644	1870	1945	1968	1968

Corn Growing Degree Days
50 M	270	264	300	350	430	509	663	697	626	520	372	296	5297
50 S	270	533	834	1184	1614	2123	2786	3483	4109	4629	5001	5297	5297

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