Find out what the weather forecast is for today and tomorrow for the United States. Free weekly weather forecasts are available for major American cities in the USA on Weather Wherever.
Bordered by the Pacific and Atlantic Oceans, Canada, and Mexico, the United States of America is a federal republic consisting of fifty states and a federal district with a population of over 316 million. The forty-eight contiguous states and Washington, D.C. are in central North America while the state of Alaska is in northwestern North America, and Hawaii is in the mid-North Pacific. The US's geography and climate is very diverse with deserts, plains, forests, and mountains. Popular destinations for tourists include New York City, California, Las Vegas, Florida, Colorado, and the Grand Canyon. The United States is home to many climatic zones from subtropical to desert to continental. The climate changes according to geographic location and elevation and is also highly influenced by the bodies of water, mountains, and the air descending from Canada or rising from Mexico. The country is also affected by various weather phenomena such as hurricanes, tornadoes, blizzards, supercell thunderstorms, and droughts. The average mean temperature for the contiguous US is 23°C in summer and 0°C in winter. Extreme temperatures are possible in both summer and winter. The average annual precipitation for the contiguous states is 742mm.