NAPA STATE HOSPITAL, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(046074) NAPA STATE HOSPITAL
From Year=1893 To Year=2012
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	5	16	46	90	196	318	391	386	353	227	53	7	2087
57	2	7	26	59	144	259	329	324	293	173	31	3	1649
60	0	2	10	29	82	176	237	231	207	102	11	1	1088
65	0	0	2	7	28	73	100	96	91	32	1	0	430
70	0	0	0	1	8	27	30	25	31	7	0	0	129

Cooling 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.
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