Lehigh Valley has all four seasons; Winter, Spring, Summer, and Fall.
Winter is more than just Christmastime in the Christmas City, though that is a highlight. There's also skiing and outdoor recreation, taking some of the trails from summer and turning them into completely different, yet familiar places.
Spring, ushers in warmer temperatures and rain, which leads to a resurgence of green and more colors as April showers do bring May flowers.
Summer is warm and humid with occasional thunderstorms, but there are plenty of outdoor recreations and trails with shade, so that you can enjoy the great outdoors and still beat the heat.
Fall brings cooler temperatures, as the leaves change colors and the days start to get shorter. Lehigh Valley festivals aren't just for the summer, as you'll find something to do most weekends throughout September and October.