Where would I find preponderant wind directions about 33 cities across the world?

Your answer can be found at
http://www.ncdc.noaa.gov/oa/climate/rcsg/specialized.html
This is a specialized product. These Specialized Products can be
provided on digital media or as paper copy (unless otherwise
indicated). There are charges involved for these services. Please call
828-271-4800 or email ncdc.info@noaa.gov for further information.

Wind Rose Summary: This summary provides a statistical summary of wind
speed vs wind direction for any station (U.S. or foreign) reporting
adequate observational data. Data are tabulated in incremental 'bins'
such as 0-3 miles per hour, 4-7 miles per hour, etc.