TRACY PUMPING PLANT, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(049001) TRACY PUMPING PLANT
From Year=1955 To Year=2005
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	578	382	294	173	62	12	1	0	4	62	323	563	2455
60	423	242	154	73	14	1	0	0	0	14	183	409	1514
57	332	163	86	36	4	0	0	0	0	4	114	317	1056
55	272	116	53	20	1	0	0	0	0	2	78	259	800
50	141	33	9	2	0	0	0	0	0	0	22	131	339

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 Apr 5, 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