GILLESPIE FLD, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(043410) GILLESPIE FIELD
From Year=1959 To Year=1979
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	363	276	248	157	64	14	0	0	1	38	177	358	1696
60	213	142	113	54	10	1	0	0	0	7	68	206	815
57	135	75	56	21	2	0	0	0	0	3	30	126	448
55	93	44	31	8	1	0	0	0	0	1	15	83	276
50	26	6	3	0	0	0	0	0	0	0	1	21	58

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 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