CALLAHAN, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(041316) CALLAHAN
From Year=1943 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	926	723	678	519	324	133	26	35	140	416	725	930	5575
60	771	582	523	370	192	55	5	7	57	269	575	775	4181
57	678	497	430	285	128	28	1	2	30	190	485	682	3437
55	616	441	368	232	92	17	0	1	18	144	425	620	2975
50	461	301	221	120	32	3	0	0	3	59	281	466	1946

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