PALO ALTO, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(046646) PALO ALTO
From Year=1953 To Year=2012
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	6	17	40	86	184	300	361	358	314	178	38	7	1889
57	3	8	20	56	132	241	300	296	254	126	20	3	1457
60	0	2	6	27	72	159	208	203	168	65	5	1	916
65	0	0	0	6	21	59	75	69	60	15	0	0	304
70	0	0	0	1	5	17	17	13	15	2	0	0	69

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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