This 29-mile highway connects Baltimore, MD and Washington, D.C., and has carried visitors to and from the capital city since 1954. The Washington, D.C., area has a four-season Mid-Atlantic climate, with warm and humid summers, cold and sometimes snowy winters, and transitional spring weather that can shift between warm, humid air from the south and cold, dry air from the northwest. The warmest months are June, July, and August, with average highs in the 80s combined with high humidity, and temperatures often climb into the 90s.
