NAPA STATE HOSPITAL, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(046074) NAPA STATE HOSPITAL
From Year=1917 To Year=2006
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	6	17	46	90	193	317	387	384	351	226	53	7	2076
57	2	7	26	59	141	258	325	322	292	171	31	3	1637
60	0	2	10	28	81	175	233	229	206	101	12	0	1077
65	0	0	1	7	27	74	98	94	89	32	1	0	424
70	0	0	0	1	8	27	29	25	30	6	0	0	126

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 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