The rainiest city in the United States is Mobile, Alabama, according to a 2007 article on LiveScience. The city averages 67 inches of rain annually and experiences approximately 59 rainy days per year.
It's a common misconception that Seattle, Washington, is the rainiest city in the United States, when, in fact, the top 10 rainiest cities are all located in the eastern half of the states. Cities throughout Florida, Louisiana and Texas also experience some of the highest amounts of rainfall across the country. These states, including Alabama, all sit on the Gulf of Mexico and receive the heaviest amounts of rainfall between June and November. This is due to the warm waters around the equator that are very active during hurricane season.