PALOMAR MOUNTAIN OBSERV, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(046657) PALOMAR MOUNTAIN OBSERV
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	697	606	604	441	267	82	5	8	45	214	468	666	4101
60	543	465	451	305	160	37	1	2	18	118	325	511	2935
57	451	382	364	233	111	21	0	1	10	77	247	420	2318
55	391	330	310	191	86	14	0	0	6	57	202	361	1948
50	253	210	192	109	41	4	0	0	2	23	110	228	1171

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