HAYFIELD RESERVOIR, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(043855) HAYFIELD RESERVOIR
From Year=1948 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	43	88	189	365	612	842	1075	1041	829	517	178	43	5822
57	26	60	144	309	551	782	1013	979	769	456	134	25	5248
60	11	30	89	232	459	692	920	886	679	367	80	9	4453
65	2	6	32	122	313	542	765	731	529	229	24	1	3295
70	0	1	6	49	182	394	610	576	381	113	4	0	2316

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