Are these shoes warmer than normal? Can you wear them during summer and not feel like your wearing ovens on your feet?

These shoes aren't really any "warmer" but they have a few features that are waterproof, thus making them warmer in cold conditions. They have taped seams between the sole and the insole. This is so water doesn't seep in, and keeps your body heat in the shoes in colder conditions. They also have a stitched inner liner and a gusseted tongue. Again, this is to keep the cold and water off your precious toes. In warmer weather, you may notice they are slightly warmer than a regular Milita from DVS, but it wouldn't be uncomfortable. You probably wouldn't notice the difference unless it was 90 degerees or more.