Top down for the most part till it gets down to 40 f. Sometimes on a long ( over 100 miles ) hi way trip I will keep it up. If it starts raining I just go faster and put the windows up.
Last year we were up in the Adirondack mountains checking out the fall leaves. About 50 degrees and kinda raining. We were cruising around 65 mph, so the rain was not getting into the cabin. We come up on a road block for an immigration check point. The boarder patrol cop asks if we are getting wet with the top down. My wife shoots back, not as long as we keep moving. The cop just laughs and says have a nice day
