Best Time to Visit Zion National Park from Las Vegas: Heat, Crowds & Storms

Dates and prices for the small-group Zion day tour:

Road closure, checked October 6, 2026. A rockfall on September 30, 2026 closed the Zion-Mount Carmel Highway. The park's alert of October 5 says the road is closed from Canyon Junction to the Great Arch pullout, with no reopening date, so the tunnel and the Canyon Overlook Trail can only be reached from the park's East Entrance. Day tours from Las Vegas reach Zion Canyon as usual. If your tour lists the tunnel or the Canyon Overlook Trail, confirm its current itinerary with the operator: the featured tour's listing says stops can be changed or replaced because of park rules or weather. Check the park's current alerts before you travel.

Month by month in Zion Canyon

The canyon changes through the year in a fixed order, even though the dates move. In March and April the trees along the Virgin River leaf out and the first wildflowers bloom, with claret cup cactus flowering around mid-April. Snowmelt from the plateau raises the river in spring: the park closed the Narrows, the river hike that starts where the Riverside Walk ends, for high water for weeks in 8 of the 15 years from 2012 to 2026, usually between April and June. Summer is hot and dry until July, when the storm season starts. Fall color starts on the highest ground and reaches Zion Canyon at the end of October and in early November. In winter, snow dusts the higher cliffs after storms, while on the canyon floor it usually melts within hours.

The temperatures are long-term averages for Zion Canyon near the South Entrance, at about 4,000 feet, so read them as a way to compare months, not as a forecast for your tour. A day with rain or snow means at least 0.01 inch. The visit counts are the park’s own figures for 2025 and count every visit to Zion, not people on tours.

April and October are the two months when highs sit in the 70s°F, which is comfortable for a few hours of walking in the sun. October is a little warmer and has slightly fewer wet days; April has the fresh green leaves and the spring wildflowers, and in some years a high river.

Other experiences you might enjoy

From Las Vegas you can also reach Bryce Canyon, the Grand Canyon, Antelope Canyon and Horseshoe Bend on a day or multi-day tour, or stay closer with Valley of Fire, Red Rock Canyon and the Hoover Dam.

Summer heat and the storm season

From June to August Zion Canyon is hot. July highs average about 100°F, and an average July has about 20 days of 100°F or more; June and August are close behind, and September still has about 20 days of 90°F or more. The park describes summer as hot, with temperatures regularly over 100°F, and asks visitors to carry plenty of water and take care to avoid heat illness. Las Vegas is hotter still, with July highs at the airport averaging about 105°F, so a day trip does not escape the heat at either end.

On a day tour the operator sets the times, and most Zion tours leave the Strip early in the morning. One tour on this site, the Zion hiking day trip, says its departure is earlier than usual between July 1 and September 1 to avoid the hottest part of the day. Whichever tour you book in summer, bring water, a hat and sun protection: trails such as the Canyon Overlook Trail have little shade.

The park names July to September as its summer storm season, when thunderstorms bring the highest flash flood risk, although it warns that flash floods can happen at any time of year. The Narrows closes when the National Weather Service issues a flash flood warning and stays closed for at least two hours after it ends; on July 18, 2026 the park closed the Narrows and its slot canyons as storms moved in. Day tours from Las Vegas do not go into the Narrows, but a storm can still change the day’s stops. The National Weather Service in Salt Lake City publishes a daily flash flood potential rating for Zion, from “not expected” to “expected”, and the park says anything from “possible” upward is a serious cause for concern.

Summer has its own advantages: June is the driest month, and the evenings are long.

Winter: December to February

Winter in Zion is cool and quiet. Daytime highs in Zion Canyon are in the 50s°F, and nights drop below freezing on about 18 to 20 nights a month in December and January, so pack a warm layer for the morning. The park says nearly half of Zion Canyon’s yearly precipitation falls between December and March. Roads are plowed, but the park can close some trails because of ice, and sections of the paved Riverside Walk can close when they are icy. Shoes with good grip help on shaded paths.

The canyon shuttle does not run in most of winter, so private cars can use the Zion Canyon Scenic Drive, and the park closes the road for the day when its parking is full. The Kolob Canyons Road can close for snow or ice, and the upper Kolob Terrace Road closes for the season. Zion Lodge stays open all year. Snow often dusts the higher cliffs after a storm, while on the canyon floor it usually melts within hours.

How busy is Zion?

Zion had about 5 million visits in 2025. The busiest months were May and June, at about 589,000 and 585,000, and October still had about 504,000. November dropped to about 310,000, and January and February were the quietest, at about 150,000 and 162,000. The pattern was similar in 2024, when June was the busiest month.

The park says Zion can be very busy from early February to late November, with parking often full by early or mid-morning. Its three busiest weekends of the year are Memorial Day, the Fourth of July and Labor Day; it also lists Easter week and Pioneer Day, the Utah holiday on July 24, as busy times. March is spring break for many visitors, and the park saw almost three times as many visits in March as in February. It also says weekdays are less busy than weekends.

On a day tour the operator deals with parking, so crowds mainly mean busier trails and longer lines for the canyon shuttle, which the park says can be more than an hour at busy times. These figures count all visits to Zion, not people on any tour, so they show the shape of the year rather than how full a particular trail will be.

The Zion Canyon shuttle by season

In 2026 the Zion Canyon shuttle runs daily from March 7 to November 28, then on a holiday schedule from December 26, 2026 to January 2, 2027. While it runs, private cars cannot use the Zion Canyon Scenic Drive, and everyone, tour groups included, rides the free shuttle to stops such as the Grotto and the Temple of Sinawava, where the Riverside Walk starts. The 2027 dates have not been published yet; in most years the shuttle runs daily from March through November. Stops, hours and last buses are in the Zion Canyon shuttle guide.

Check your date

Choosing a tour for your month

Most Zion day tours from Las Vegas take about 12 hours, with hotel pickup on the Strip early in the morning. The featured small-group Zion tour with lunch lists the Visitor Center, the Canyon Overlook Trail and the Riverside Walk, with groups of up to 13. In spring and fall that is a comfortable day of walking; in summer the heat makes the same walks tiring by midday, and in winter you need warm layers and good shoes.

If you go in July or August, the Zion hiking day trip is the one that says it leaves earlier in summer. The Bryce and Zion scenic tour adds Bryce Canyon, which sits much higher and is much cooler in summer, but it gives Zion itself about 40 minutes. Its listing says it operates year-round, although when we checked on October 6, 2026 its first bookable date was April 1, 2027, so check its calendar for your dates. Compare every departure.

Choosing the month for a wider Las Vegas trip

If Zion is one day of a longer Las Vegas trip, the same months work for the city. Las Vegas is hotter than Zion Canyon in summer, with July highs averaging about 105°F at the airport against about 100°F in Zion Canyon, and it is mild from October to April. Zion is on Mountain Time, one hour ahead of Las Vegas, so times in the park are an hour later on the clock than on the Strip.

Sources and methodology

What a tour day looks like is in what to expect on a Zion day trip from Las Vegas, the hikes and the high-water rules in the Zion Narrows guide, and the choice between tours in which Zion tour from Las Vegas is right for you.

Frequently asked questions