try, re the average speed, as a test:
http://www.weather-display.com/downloadfiles/weatherdisplaymaczip.zip
and unzip that exectutable file to the
/Applications/weatherdisplay.app/Contents/MacOS/
folder
I only have a console here, no actual windspeed or temp/hum unit (but I might be able to get that at some stage to help in testing/improvements)