WILLOW CREEK 1 NW, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(049694) WILLOW CREEK 1 NW
From Year=1968 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	686	520	474	341	170	49	8	6	39	231	483	691	3698
60	531	378	320	206	76	14	1	1	9	112	334	536	2518
57	438	294	231	137	40	5	0	0	3	61	248	443	1901
55	377	239	178	99	23	2	0	0	1	38	194	382	1534
50	230	115	76	33	3	0	0	0	0	7	81	231	776

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