AVALON CATALINA AP, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047910) SANTA CATALINA WB AIRPO
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	368	296	373	305	230	165	33	22	37	80	191	329	2429
60	237	179	234	184	109	59	2	1	4	23	90	200	1322
57	169	119	158	118	51	18	0	0	0	7	46	131	818
55	127	85	112	78	24	5	0	0	0	3	26	91	551
50	46	25	26	15	1	0	0	0	0	0	4	24	142

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