In Spain we definitely have mosquitos, and most Augusts we have these summery storms, sometimes bringing also hailstorms (sizze varies though between drop sized ice and golfball sized ice)
Cold isn't required for hailstorms. The ice forms at altitude. We have a lot of hailstorms in the spring and summer in Colorado, and while it isn't the mosquitoiest place I've ever lived, there are mosquitoes.
