Yes, the United States is a very humid place. When compared to other parts of the world, the United States is significantly more humid. For example, Europe has very low humidity levels across almost the entire continent. In contrast, the vast majority of the United States is considered to be relatively humid. Even though there are some places that are not that humid, such as the desert Southwest, most cities in the United States are relatively humid. Even if you are not necessarily on the coast, the humidity can still be very high.
Keep in mind that the humidity level can change on a daily basis. On the other hand, when looking at average humidity levels, New Orleans, Louisiana is the most humid city in the United States. There are a few reasons why New Orleans is so humid. First, New Orleans is actually below sea level. Once you start getting below sea level, you start digging into the Earth. Therefore, the humidity level will go up significantly. Furthermore, New Orleans is located right on the Gulf of Mexico. Therefore, there is a lot of water coming in from the Gulf. There are several other cities that are humid as well. For example, Baton Rouge, located in Louisiana, is also quite humid. Furthermore, there are some cities on the Gulf Coast of Texas that are relatively humid as well.
Yes, just about all of Florida is humid. Almost the entire state is a swamp. Therefore, the humidity level is very high. For example, Jacksonville, Florida, which is located in the northern part of the state, is very humid. Then, if you are in the center of the state, you will find Orlando. Orlando is known for its amazing theme park, but it also has a high humidity level even though it is an hour from the coast. Furthermore, Tampa Bay, located on the Gulf Coast of Florida, is also very humid. Finally, Miami, which is located at the southern tip of Florida, is also very humid. All of these cities are located in the top 10 most humid cities in the United States. No matter where you go in Florida, it is going to be very humid.
There are a lot of people who believe that if you are on the coast, it is always going to be humid. Indeed, if you are located on the eastern coast of the United States, the humidity level is going to be very high. On the other hand, if you head to the Pacific coast, you will find that the humidity level is significantly lower. It isn't just your proximity to the water that matters, but the way the current flows. For example, there are plenty of cities located in Europe that sit on the coast but are not that humid. Therefore, there are a lot of factors that determine humidity.