If you really want it, you can download it here . June and July are the hottest months. Midday temperatures can reach close to 100 F, but mornings and evenings are usually very pleasant. Thunderstorms can bring flash floods from May through September. Spring and fall are mild, with warm days and cool nights.
Winter days are cool, and at night temperatures often drop below freezing.
Snowfall is usually light. The average annual rainfall is less than seven inches, and humidity is low. The visitor center offers exhibits, a slide program, and other information. Books, maps, postcards, and videotapes are also available. It is located at the junction of Route 24 and the scenic drive.