MOUNT HAMILTON, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(045933) MOUNT HAMILTON
From Year=1948 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	700	621	671	525	344	152	31	41	94	254	499	676	4608
60	547	481	519	386	225	82	10	15	45	153	358	523	3342
57	458	400	431	309	165	52	4	7	25	106	281	433	2672
55	401	347	374	262	131	37	2	4	16	81	234	376	2264
50	267	226	243	158	65	13	0	1	4	35	134	245	1390

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