FAIRFIELD, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(042934) FAIRFIELD
From Year=1950 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	208	320	454	553	749	876	1011	1004	917	745	423	224	7483
40 S	208	528	981	1534	2284	3159	4170	5174	6091	6836	7259	7483	7483
45 M	88	183	300	403	594	726	856	849	767	590	276	101	5733
45 S	88	271	571	974	1568	2294	3150	3998	4766	5356	5632	5733	5733
50 M	22	72	159	257	439	576	701	694	617	435	145	27	4146
50 S	22	94	254	511	950	1526	2226	2920	3538	3973	4119	4146	4146
55 M	2	16	60	132	287	426	546	539	467	283	54	4	2816
55 S	2	18	78	210	497	923	1468	2007	2475	2758	2812	2816	2816
60 M	0	2	14	50	153	279	391	384	318	148	12	0	1750
60 S	0	2	15	66	218	497	888	1272	1590	1738	1749	1750	1750

Corn Growing Degree Days
50 M	95	166	251	322	448	535	624	622	567	454	236	106	4427
50 S	95	261	512	834	1283	1818	2441	3064	3631	4085	4321	4427	4427

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