Climate And Weather At The Grand Canyon
Difference between Rim and Canyon. The climate at the Grand Canyon refuses to be defined in a paragraph. What is true of the country along the rim is not true of the banks of the river itself. The midway region, half-way down the trail, likewise has a climate all its own. For as you go down in summer, the thermometer goes up; and as you come up, in winter, the thermometer goes down. The difference of nearly a mile in altitude between the surface of the Colorado River and the rim of the Canyon is equivalent to going hundreds of miles north and south on the level. Hence it is that when it is winter on the rim, it is like spring down in the depths; when it is spring on the top of the world, the heat below is tropical.

Weather not Extreme. Bear in mind, though, that neither the cold of winter nor the heat of summer, in northern Arizona, are as frigid or as torrid as the readings of the thermometer may seem to indicate. The cold or heat is not felt to such an extreme as in the East. A minimum of humidity is the basic reason for this wide difference between, for example, the July or January climate of New York, and the July or January climate of the Grand Canyon. Extremes that in New York drive people to the cool seashore or To California's winter warmth, here bring no discomfort. You don't feel the weather changes so much, just because the air is so much dryer.