August 31, 2015

by Suzanne Mathia

Clouds fill the Grand Canyon, as viewed from the Yavapai Museum of Geology on the South Rim.

August 30, 2015

by Roberto Heredia

Lightning from a monsoon storm flashes over the border town of Nogales.

August 29, 2015

by Bill Ferris

Bison bulls on the Grand Canyon’s North Rim spar for dominance.

August 28, 2015

by Klaus Priebe

A summer monsoon storm approaches the Vermilion Cliffs in late summer.

August 27, 2015

by Sherry Miller

Water covers a serene, pine-ringed meadow on the Mogollon Rim.

August 26, 2015

by Rich Lewis

Black-and-White Wednesday: A tornado touches down near Kayenta on the Navajo Nation.

August 25, 2015

by Rhonda McMacken

A frog eyes the photographer in Flagstaff.

August 24, 2015

by Steve Copen

A storm brews in the distance, as seen from Chino Valley looking toward Jerome.