May has long and sunny days amid clear skies in the spring season of Utah. The average high temperatures are in the warm 52°F (11.1°C) to 86°F (30°C) range, while the average low temperatures are in the mild zone of 30°F (-1.1°C) to 59°F (15°C). The days receive plenty of sunshine as crowds fight in the canyons of the state. It is not often that Utah weather remains moderate during both day and night. Snowfall is absent except for the high mountains, and the land is freeze-free. River rafting and canoeing are popular among adventure seekers in the deep gorges of the Colorado River. Late spring is an ideal time to visit the national parks such as the Arches, Bryce Canyon, and Zion, with plenty of wildlife for company. Trees and flowers bloom, but the smell is not always pleasant, and allergies are a concern. Although the conditions seem warm, it is a prudent idea to carry a sweater in spring. May is one of the best times of the year to visit Utah.