Zion Weather: Forecasts, Climate & Best Time to Visit

By Jocelyn Pion · Data: National Park Service · ← Complete guide Zion

Zion Canyon packs two distinct climates into a small area. The canyon floor sits at 3,900 feet, where temperatures regularly top 100°F in July, while plateaus reaching 8,500 feet get snow in winter. The daily temperature swing often exceeds 31°F between dawn and midafternoon. In short, expect a continental semi-arid climate, blazing-hot summers, mild valley winters, and monsoon weather from mid-July through September. Spring (April–May) and fall (October–November) offer the best balance of comfortable weather and moderate crowds.

Zion Climate Month by Month

The averages below apply to the canyon floor around Springdale (3,700 feet). The plateaus, including Angels Landing and Observation Point, are consistently 9 to 14°F colder.

June is the driest month of the year, with 0.5 inches of precipitation. July and August climb to 1.0 and 1.2 inches as the monsoon arrives, bringing sudden late-day thunderstorms and an immediate flash-flood risk in narrow canyons.

Zion's Climate by Season

Winter (December to February)

Winter stays mild on the canyon floor. Midday temperatures reach 50 to 55°F, while nighttime temperatures drop below freezing. The plateaus are much colder, and snowfall is frequent. Some high-elevation trails close temporarily after storms. The Zion-Mount Carmel Highway may require tire chains. The park stays open year-round, and winter light on the red sandstone has a quality you don't get in summer.

Spring (March to May)

March is still unpredictable, with overnight freezes, showers, and occasional late snow at higher elevations. By April, the weather settles down and highs reach 72°F. Snowmelt feeds the Virgin River heavily. That makes for spectacular conditions along The Narrows, but flows can rise suddenly after rain and close the canyon with little warning. Crowds pick up starting Easter weekend, so book early.

Summer (June to August)

June is the driest month, but it already feels hot and heavy, with midday highs around 93°F. From mid-July through early September, the monsoon moves up from Arizona. Thunderstorms usually develop between 2 and 5 p.m., sometimes bringing hail and powerful wind gusts. Heat builds on the canyon floor, where temperatures regularly reach 100°F, with more humidity than in June. This is peak season, so reserve the shuttle, which is required for Zion Canyon Scenic Drive, well in advance.

Fall (September to November)

September can bring monsoon weather through midmonth, then conditions settle down. October is often the best window of the year, with daytime highs around 75°F, clear skies, and thinning crowds. In November, the cottonwoods turn vivid yellow in the canyon and the days get shorter, but hiking conditions remain excellent if you're willing to start with cool mornings around 34°F.

Does Zion Get Cold or Hot? Records and Extremes

Both. The canyon floor traps heat between its sandstone walls. Summer highs sometimes reach 108°F during heat waves, and monsoon humidity makes them even more punishing. On the other hand, winter nights on the plateaus fall below 14°F, something travelers from the southern United States don't always anticipate. The daily swing exceeds 31°F in spring and fall, so keep that number in mind when packing.

What to Wear by Season

Spring and fall. Dress in three layers: a technical T-shirt, a lightweight fleece, and a waterproof windbreaker. Mornings start out cool, while afternoons can climb above 68°F. Wear waterproof hiking shoes if you're entering The Narrows or hiking after rain.

Summer. Wear lightweight, breathable clothing. Avoid cotton, which holds onto sweat. Bring a wide-brimmed hat and at least SPF 50 sunscreen. Start major hikes before 8 a.m. and return by 11 a.m., or wait until 4 p.m. to head out. Carry at least 3 liters of water per person for a 4-hour outing. The canyon walls block the wind and make the heat feel worse.

Winter. Bring an insulated coat, a warm hat, and gloves for the first hours of the day. If you're heading onto the plateaus after a snowfall, pack microspikes, small traction chains, because high-elevation trails can be icy. Hiking The Narrows isn't recommended from November through March without a proper wetsuit. Water temperatures in the Virgin River drop to 39–50°F during that period.

Weather Alerts and Conditions to Watch

Zion faces two distinct weather hazards that shouldn't be underestimated.

Flash floods. The limestone plateau above the canyon funnels runoff within minutes of a thunderstorm, even one far away. Before entering The Narrows or any other slot canyon, check National Weather Service (NWS) alerts for the area and the closure signs at the trailhead. A flash flood can occur under clear skies on the canyon floor if a storm hits the plateau 9 to 12 miles away.

Lightning. In summer, leave ridgelines and exposed areas such as Angels Landing, Observation Point, and West Rim Trail by 1:30 p.m. Thunderstorms most often develop between 2 and 5 p.m.

Road closures mainly affect the Zion-Mount Carmel Highway on the east side of the tunnel and Kolob Canyons Road after heavy snowfall. Check road conditions on the official NPS website before each day trip from November through March.

Frequently Asked Questions