HAYFIELD RESERVOIR, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(043855) HAYFIELD RESERVOIR
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	398	261	179	62	11	0	0	0	0	23	171	382	1488
60	252	143	82	22	2	0	0	0	0	7	77	235	820
57	174	89	44	9	1	0	0	0	0	3	42	158	518
55	129	60	26	5	0	0	0	0	0	1	25	114	362
50	49	18	6	0	0	0	0	0	0	0	5	41	119

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