Atlantic City enjoys all four seasons, though its climate is mild most of the year. Ray-Bans and sunscreen come out around Memorial Day weekend, which means that resorts tend to run discounted specials in the preceding off-season months of April and May to lure visitors. Despite its seashore, the city isn't known for amazing outdoor events; expect indoor casinos and concert venues to be the main attraction. Also note that the beach is fairly narrow for sunbathers, and many locals prefer other nearby towns for roomier stretches of sand.
August is the least desirable month to visit, unless you like hot, muggy weather. Average highs hover around the mid-90, and the humidity means that wet clothing never fully dries. That said, all of the indoor complexes are well air-conditioned. Summer’s warmth lingers well into autumn, with breezy, pleasant days, excellent for hunting smooth, pastel pebbles on the beach.
Temperatures do dip below freezing in December or January, but the AC rarely sees snow. The winter is an ideal time to take advantage of the city’s recently renovated concert and performance venues that feature all-star shows and ticket prices much cheaper than New York City’s. Recent music performers include The Killers, Paul McCartney, Paul Simon, Madonna, Rufus Wainwright, and Dolly Parton—to give you a sense of the variety of styles. In the winter, you can typically stay at a hotel for a third off summer prices, except around holidays, such as Valentine's Day, when business from local drive-up visitors causes room rates to spike.