Flagstaff, Arizona – Dangerously high temperatures will scorch the Grand Canyon through early next week, with the inner canyon expected to hit a blistering 113°F on Monday, prompting urgent warnings for hikers.
According to the National Weather Service in Flagstaff, an Extreme Heat Warning is in effect from Saturday through Tuesday for areas of the Grand Canyon below 4,000 feet. Locations like Phantom Ranch and Havasupai Gardens are expected to remain well above 100°F for four consecutive days, making hiking treacherous and strongly discouraged.
Phantom Ranch could reach 110°F Saturday, 113°F Sunday and Monday, and remain near 113°F Tuesday. Even higher-elevation spots like Havasupai Gardens (3,800 feet) will see temperatures above 100°F each day, while popular rim trails at Bright Angel and North Kaibab will stay in the 80s.
The heat wave extends across northern Arizona, with Sedona hitting 103°F and Kingman up to 104°F on Monday. Grand Canyon Village and Flagstaff will hover near 90°F, a stark contrast to the inner canyon’s oppressive heat.
Visitors are urged to avoid hiking into the canyon, especially during midday. Carry water, stay on the rim, and check in with park rangers before any activity.
Warnings remain in effect through Tuesday evening, and additional heat advisories may follow if conditions worsen.
