Daytime temperatures may exceed 100 F from June through September, while winter temperatures often fall below freezing. Be prepared for drastic fluctuations in any season, as temperatures may vary by 50 degrees within a 24-hour period. Plan for summer thunderstorms.

This is desert country. Carry plenty of drinking water at all times, and be advised that a gallon per person per day is the minimum for desert conditions.

For further weather info go to:
www.weather.com