Zion in Summer

Weather & What to Expect

It's hot - genuinely, dangerously hot on the canyon floor. July is the peak, averaging around 100°F, with June and August close behind and overnight lows staying in the 60s. The dry heat is deceptive: exposed trails like Angels Landing bake in full sun, and heat exhaustion is one of the most common reasons for rescues here. The upside is daylight - you can be on the trail by 6 a.m. and off it before the worst heat.

The Narrows Opens

Summer is when the Virgin River usually drops enough to make The Narrows wadeable, typically from June onward - one of the park's signature experiences and a natural way to beat the heat, since you're walking in cold water between shady walls. But The Narrows is also the single biggest flash-flood hazard in the park, which is why the monsoon forecast matters so much.

The Catch: Monsoon & Crowds

From roughly July into September, the North American monsoon brings towering afternoon thunderstorms. Rain miles away can send a wall of water down a slot canyon under a blue sky overhead, so any narrow-canyon hike demands a fresh flash-flood forecast and an early finish. Crowds are also at their yearly peak: expect full parking lots, long shuttle lines, and sold-out lodging - book everything well ahead.

Best Things to Do in Summer

• The Narrows - wade the river through the canyon's most famous slot (check the forecast first).
• Dawn hikes - do the big climbs like Angels Landing at first light, before the heat.
• Water & shade - the Riverside Walk and Emerald Pools stay cooler.
• Stargazing - warm nights and long twilight make for great dark-sky viewing.

Tips for a Summer Trip

• Start at dawn and be off exposed trails by late morning.
• Carry 3–4 liters of water per person plus electrolytes; there's no water on most trails.
• Check the flash-flood forecast every day before any slot canyon.
• Book far ahead - it's peak season. Where to stay near Zion →