Arizona  California  Idaho  Oregon  Utah   

Nevada's alpine topography, central and north, and the desert conditions of the south are as different as day and night. In the southern desert area (Las Vegas), summers are hot, dry and windy. Average high temperatures are right at 90 degrees. Winters in the desert are usually quite mild, with average highs in the mid-40s, often much higher. In the central and northern mountain areas, summers are milder with cool mornings. Winter brings much colder temperatures and snow (sometimes heavy), especially in the high mountains of the Lake Tahoe area. Annual precipitation amounts are very low in Nevada, with less than 10 inches common. Some higher elevations in the mountains receive up to 30 inches, and Lake Tahoe approaches 50 inches.