May is warm and wet in Nebraska with comfortable temperatures. The skies are partly cloudy as rain and shine alternate frequently. Day temperatures average in the pleasant 68°F (20°C) to 73°F (22.8°C) range, while the nights register between 48°F (8.9°C) to 53°F (11.7°C). The chirping of birds, the vast prairie landscape, fresh aroma of flowers, lakes, and rivers filled with freshwater are the highlights of the spring season. Biking and hiking on the numerous trails, including the historic trails of the Lewis and Clarke expedition, are popular activities in spring. The precipitation increases significantly and is in the 4" (102mm) to 6" (152mm) in the east, while the west receives less than 3" (76mm) of rain. A rain jacket or umbrella is a must as the showers are frequently heavy. Thunderstorms and tornadoes play regular hosts during late spring. Expect the heat and humidity to grow steadily with the end of the season. May is the perfect time to beat the summer crowds in Nebraska who show up despite the heavy rain.