Most Helpful Girl
I would go for something that accentuates your waist. Since you think it would be warm, I would try out a skirt, not too short though. Maybe an A-line skirt that skims just above your knees? Or a pencil skirt, same length (a slit up the side would add a nice touch). For the top: a blouse that hugs your waist - if you have a bright bold coloured tank to go underneath leave the blouse unbuttoned. And you could pair that with a long sleeve cardigan in case it gets chilly. Also, to further accentuate your waist, wear a belt, but make sure you don't buckle it too high.
I hope this helps considering I know nothing of your current style! :)