VACAVILLE, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(049200) VACAVILLE
From Year=1948 To Year=2005
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	3	14	58	148	328	503	651	617	505	287	47	4	3167
57	1	6	35	108	270	443	589	555	445	230	27	1	2711
60	0	1	15	61	190	354	496	462	355	153	10	0	2098
65	0	0	3	19	89	214	342	308	213	60	1	0	1249
70	0	0	0	3	32	105	196	163	98	17	0	0	615

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 Apr 5, 2006
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