MT HAMILTON, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(045933) MOUNT HAMILTON
From Year=1948 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	694	626	668	529	342	152	30	38	93	256	498	680	4607
60	541	486	516	390	224	82	9	14	44	154	358	527	3346
57	452	404	428	313	164	53	4	7	25	107	281	437	2676
55	395	351	371	266	130	37	2	4	16	81	234	380	2268
50	263	229	242	162	64	13	0	1	4	35	134	247	1393

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