HEALDSBURG, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(043875) HEALDSBURG
From Year=1893 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	4	18	54	118	251	397	477	461	393	237	51	6	2467
57	2	8	32	80	195	337	415	399	333	182	30	2	2016
60	0	2	13	40	123	250	322	306	246	111	12	0	1426
65	0	0	2	10	46	124	173	158	116	36	2	0	666
70	0	0	0	1	14	48	62	51	40	8	0	0	224

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