PORTERVILLE, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047077) PORTERVILLE
From Year=1948 To Year=2004
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	559	361	268	137	41	4	0	0	4	61	305	555	2294
60	405	225	140	58	11	1	0	0	0	18	174	401	1432
57	315	153	82	29	3	0	0	0	0	7	110	310	1009
55	258	111	53	16	1	0	0	0	0	3	76	252	771
50	133	37	13	2	0	0	0	0	0	0	22	126	334

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