ALPINE, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(040136) ALPINE
From Year=1952 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	352	295	291	194	108	28	1	0	7	58	199	349	1882
60	214	172	160	90	34	5	0	0	1	14	95	208	993
57	144	109	98	48	13	1	0	0	0	5	52	136	606
55	103	75	65	29	5	0	0	0	0	2	32	97	408
50	34	20	15	5	0	0	0	0	0	0	6	33	112

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