The season in Zion National Park is from May 15 to October 15; at Bryce
Canyon and the North Rim of Grand Canyon from June 1 to October 15.
Dates of operation and conditions are shown in connection with all tours
on pages 39-40-41.
The climate in Zion National Park is mild throughout the season. At
Bryce Canyon and Cedar Breaks, farther north and at higher elevations,
cool weather may be expected at night both early and late in the season.
In the Kaibab Forest and at the North Rim of Grand Canyon, cool nights
are to be expected.
Southern Utah and Northern Arizona are regions of clear, dry, sunny
days, delightfully exhilarating and followed by refreshing nights. There
are occasional showers throughout the country during the summer season.