Spring, Summer, Fall, and Winter - Zion National Park (U.S. National Park Service) Are you planning a trip to Zion? Read the information below to get a general idea of what to expect during each season at Zion National Park. Winters in Zion National Park are cold and often wet. Temperatures can range from highs of 50-60°F during the day to lows well below freezing at night. Nearly half of the annual precipitation in Zion Canyon falls between the months of December and March. Roads are plowed, but certain trails may be closed due to the hazard of falling ice. After winter storms, snow typically disappears within a matter of hours at lower elevations. At higher elevations, the snow accumulates. Icy conditions may exist on trails, especially anywhere that stays in the shade. We recommend traction devices for your boots to reduce the risk of slipping. The Narrows will be cold and you will likely need a drysuit to hike safely.