LIVERMORE, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(044997) LIVERMORE
From Year=1903 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	216	293	411	510	681	822	979	966	876	704	410	233	7100
40 S	216	509	920	1430	2110	2932	3911	4877	5753	6457	6867	7100	7100
45 M	96	161	258	360	526	672	824	811	726	549	263	108	5354
45 S	96	257	515	876	1401	2073	2897	3708	4434	4983	5246	5354	5354
50 M	28	61	126	216	371	522	669	656	576	395	133	33	3786
50 S	28	89	215	431	802	1324	1993	2649	3225	3619	3753	3786	3786
55 M	4	12	42	99	222	372	514	501	426	245	47	6	2490
55 S	4	16	58	157	379	751	1266	1766	2192	2437	2484	2490	2490
60 M	0	1	7	32	104	228	359	346	278	117	9	0	1483
60 S	0	1	8	40	145	372	732	1078	1356	1473	1482	1483	1483

Corn Growing Degree Days
50 M	113	162	239	309	410	494	593	589	533	436	249	125	4252
50 S	113	274	513	822	1232	1727	2320	2909	3442	3878	4127	4252	4252

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