Precipitation

Temperature inversion affects smog when there is an increase in temperature and CO2 in the atmosphere above major city's, like Las Vegas, will heat up and combine with other gasses to form a giant killing cloud.

The average humidity following the course of a year in Florida is 61% for the lowest is 56% and the highest is 68%. In Beijing, China, the average humidity is 73%, and while in Hawaii it is about 78% the average between 73 & 81.

The "Bergeron and Collision-Coalescence" and how they affect precipitation:
Most precipitation that falls to earth's surface originates through the Bergeron process. The process requires the presence of water vapor, ice crystals and supercooled liquid water droplets (water that has been cooled below the freezing temperature, but is still a liquid form). In "cold" clouds (usually-10 degrees Celsius to -20 degrees Celsius), water vapor deposits on the ice crystals. Hence, the ice crystals grow larger while the supercooled water droplets lose mass, that is, there is a migration of mass from the supercooled droplets to the ice crystals. As the ice crystals grow larger and heavier, they start to collide and coalesce with water droplets and ice crystals in their path, thereby growing still larger. Eventually, the ice crystals become so heavy that they fall out of the cloud. If the air below the cloud is above freezing, snowflakes melt and fall as raindrops, but collision-coalescence also has to go through the Bergeron process.