July is by far the hottest and sunniest month of the year in Missouri, with occasional instances of extreme rainfall. The humidity goes up to 90% during the mornings in Kansas City and Saint Louis, which are pockets in the state that experience the urban heat island effect. Day highs often cross 100°F (37.8°C), with the central Ozarks cooler than the southern portion of Missouri. The average high temperatures across the state are in the hot 86°F (30°C) to 92°F (33.3°C), while nights show large variations up to 30°F (-1.1°C) from the day. The precipitation is to the tune of 4" (102mm) to 6" (152mm) and is mainly from thunderstorms and occasionally hailstorms. Summer is the peak tourist season with camping, fishing, biking, and trailing gaining momentum. The sun is scorching and shines for at least 10 hours a day. The sunny days witness crowds at the lake and river beaches. Sun goggles and sunscreen are handy to combat the blazing sun in July in Missouri.