I'm in Ohio, and it is the same here. My basement, which is where the snakes are housed, is usually cooler than my living area. It is usually kept around 70 F, or so. Almost all of my tubs, even my tubs in my Reptile Basics racks, get a lot of condensation in the winter. It could also be because I use newsprint as substrate in my tubs. I don't get as much condensation in the summer.