UPPER LAKE, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(049173) UPPER LAKE
From Year=1893 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	659	522	477	328	203	63	7	8	52	215	451	643	3627
60	504	381	325	193	98	18	1	1	13	103	302	488	2425
57	411	297	241	126	52	7	0	0	4	57	216	395	1807
55	350	243	189	89	31	3	0	0	2	35	164	333	1439
50	203	121	86	28	5	0	0	0	0	8	62	185	697

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