The climate of Texas varies widely, from arid in the west to humid in the east. The events that contribute to the famous Texas humidity are often characterized as extreme weather events. The location of Texas in the tropical zone of the planet and its proximity to a large body of water are two factors that give rise to extreme weather conditions. In addition to humidity, Texas is also known for its high temperatures and occasional droughts.
As noted above, if relative humidity is analyzed, Alaska is the wettest state. This is a function of low temperatures. A cold air mass simply cannot hold a lot of moisture. The average dew point in Alaska is the lowest of the 50 states.
This is a more faithful reflection of the humidity regime.