Winter 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 trails may be closed due to snow and ice. After winter storms, snow typically disappears within a matter of hours at lower elevations. At higher elevations, the snow accumulates. As temperatures rise in spring, melting snow causes high water levels in the Virgin River and its tributaries.