CUYAMACA, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(042239) CUYAMACA
From Year=1899 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	787	676	655	500	335	121	17	22	94	335	567	760	4869
60	632	535	500	354	203	53	3	5	37	199	418	605	3543
57	539	450	409	272	139	29	1	1	18	132	330	512	2834
55	477	394	349	222	105	19	0	1	11	97	273	451	2400
50	326	258	214	120	47	5	0	0	2	38	149	300	1459

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