SAN GABRIEL FIRE DEP, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047785) SAN GABRIEL FIRE DEPT
From Year=1939 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	480	478	583	665	795	896	1082	1105	1014	869	625	490	9082
40 S	480	959	1541	2207	3002	3897	4979	6084	7098	7967	8592	9082	9082
45 M	327	337	428	515	640	746	927	950	864	714	475	336	7259
45 S	327	664	1092	1607	2247	2993	3920	4869	5734	6448	6923	7259	7259
50 M	185	202	275	366	485	596	772	795	714	559	326	191	5464
50 S	185	387	662	1027	1512	2108	2880	3674	4389	4948	5273	5464	5464
55 M	77	90	138	222	330	446	617	640	564	405	185	77	3790
55 S	77	167	305	527	857	1303	1920	2559	3124	3528	3714	3790	3790
60 M	21	27	48	103	182	296	462	485	414	253	76	18	2385
60 S	21	48	96	199	381	677	1139	1623	2038	2291	2367	2385	2385

Corn Growing Degree Days
50 M	300	289	346	394	485	574	715	725	649	539	387	310	5713
50 S	300	589	934	1328	1813	2387	3103	3828	4477	5016	5404	5713	5713

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