As I write this, it’s in the 80s — again. The city is hot, and the countryside is too. But an exhibition like “Town and Country” let’s me imagine the breezes and cooler temperatures of season-long spring. The show features plein air paintings by 15 artists, all of whom worked outdoors to capture the effects of light. Many works are landscapes from our wonderful Frederick Law Olmsted-designed park system. Not to be outdone, the paintings created in the city are from historic neighborhoods like Butchertown, Cherokee Triangle and St. James Court.