FOLSOM DAM, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(043113) FOLSOM DAM
From Year=1955 To Year=1993
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	594	394	339	206	80	14	1	1	8	78	321	569	2604
60	439	255	195	99	23	2	0	0	1	26	187	414	1641
57	347	177	122	54	9	1	0	0	0	11	120	322	1163
55	287	131	82	33	4	0	0	0	0	6	84	263	889
50	152	46	22	6	0	0	0	0	0	1	25	134	385

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