I have a couple of similar pairs. The fingerless gloves are roofing gloves. The last finger is sometimes left on to protect your finger from the abrasive shingles when you set a nail down to hammer. They dont' have as much padding and typically don't let the air flow through as easily.

I wear them at various temperatures, with fingers, without fingers. But in the heat of the summer I wear a pair of cycling gloves because they have less material and better padding. Those allow my hands to breath better and have saved me from rash. Having additional pairs of cheaper gloves allows me to stretch out the life of the cycling gloves.