In what layer of the atmosphere do most weather phenomena occur?

Most weather phenomena occur in the troposphere, which is the lowest layer of the Earth's atmosphere. This layer extends from the surface up to about 8 to 15 kilometers (5 to 9 miles) in altitude, depending on geographical location. The troposphere contains the majority of the atmosphere's mass and is where clouds, precipitation, and various weather events take place due to the presence of water vapor and temperature variations.