There are some things that you add to your vehicle in the winter that you can leave on that vehicle in the summer, but winter tires should be taken off your vehicle as the weather warms up. You should switch out your tires before summer arrives.
It is important that you take the winter tires off of your vehicle and replace them with summer or all-season tires. Winter tires are not made to be used on warm roads and they tend to wear down quickly when they are subjected to the warmth.