FAIRFIELD, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(042934) FAIRFIELD
From Year=1950 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	574	386	320	207	90	22	3	3	11	84	332	560	2592
60	419	246	178	94	24	2	0	0	1	23	192	406	1583
57	327	167	107	47	7	0	0	0	0	8	121	314	1098
55	267	119	69	27	3	0	0	0	0	3	83	254	826
50	132	35	15	4	0	0	0	0	0	0	24	123	333

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
Table updated on Jul 28, 2006
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