CALISTOGA, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(041312) CALISTOGA
From Year=1948 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	514	377	337	232	119	26	2	2	17	113	345	532	2615
60	360	240	195	113	39	4	0	0	2	38	202	377	1572
57	269	165	124	61	15	1	0	0	1	17	129	285	1067
55	211	121	84	37	6	0	0	0	0	9	89	226	784
50	87	43	23	7	0	0	0	0	0	0	27	101	289

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