Weather fronts are boundaries between two different air masses, which can have varying temperatures and humidity levels. When these air masses meet, they create changes in weather conditions. There are four main types of fronts: cold fronts, warm fronts, stationary fronts, and occluded fronts. Each type can lead to different weather patterns, such as rain, thunderstorms, or clear skies. Cold fronts occur when a colder air mass pushes into a warmer one, often causing storms. Warm fronts happen when warm air rises over cold air, leading to gradual precipitation. Understanding these fronts helps meteorologists predict weather changes and improve forecasts.