On Sun, 20 Feb 2005 11:43:58 GMT, "W. Wat son"
wrote:

Is there a source that will tell me how many clear days a particular region
(city) has had over some period of time? In particular, I'd like to know
how many clear (reasonably cloudless) days we've had since Oct. 1, 2004.


Try

http://www.wrh.noaa.gov/climate/index.php?wfo=sto

Select "Monthly Weather Summary CLM" Sacremento

and select each of the months that you want data for.

CLIMATE REPORT
NATIONAL WEATHER SERVICE SACRAMENTO, CA
952 AM PST TUE FEB 1 2005

....................................
snip
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.80
NUMBER OF DAYS FAIR 3
NUMBER OF DAYS PC 8
NUMBER OF DAYS CLOUDY 20

AVERAGE RH (PERCENT) 87

snip

and total it all up.

Jim