I drive mine with the top down in any temp from about 50 on up (just need a jacket and a hat). It has to get really cold before it's too cold, and there's no such thing as too hot! Dunno what you lightweights are talking about
But yeah, I certainly get more top down weather down here than you will up there, I imagine. But just saying, don't narrow down your window of what is 'top down weather' too much. It varies from person to person, you might be crazy and like it down in 50-degree weather too!