July is peak summer in Mississippi, with the average high temperatures between 89°F (31.7°C) to 92°F (33.3°C). The heat becomes unbearable, mostly because of the oppressive rise in humidity. Nights are relenting than the days but are still warm in the 63°F (17.2°C) to 74°F (23.3°C) zone. Jackson and Greenwood in the central region register temperatures in the range of 71°F (21.7°C) to 92°F (33.3°C) at the height of summer. The 9 hours of daily sunshine is unrelenting, and afternoons routinely see thunderstorms. Midsummer brings heavy rainfall along the coast, and tropical cyclones are on the rise. Temperatures often rise above 100°F (37.8°C) in many regions, and heat waves frequently invade the state. People usually wear sweatshirts and shorts in hot and humid conditions, and there is rarely an establishment without an air-conditioner. Zoos and museums are busy due to summer vacations, but the long daylight hours offer ample time to explore them. A Mississippi visit is avoidable in July at the peak of the hot season.