I love my Cabrio!!
I would have to say, the hot Summer months are
not my favorite time of year to run with the top back though, since I have to run the A/C and that seems kinda silly. The sun beating directly on you at a traffic light can be intense! I've got a ball cap for some protection ... but the Dog Days of Summer require me to keep the roof closed for the most part.
My favorite weather for topless driving would be overcast with temps from 55 to 80. But, that's just me. When the weather doesn't suit you, close the roof. When it pleases you, open it up.
With the smart's cabrio design you can change your mind ...
Even at highway speed.

Get the Cabrio!!!