Comment by orbital-decay

Are we still talking about smartphone cameras? If yes, apps already heavily rely on much more advanced computational photography than your average photo editor can do, including but not limited to ML denoisers. The problem is that such apps are typically optimized for the "average case" and are as automated as possible, so they either remove snow, rain, and haze intentionally, or lose small moving particles as the result of stacking. That said, snow and rain are usually possible to capture in the apps that attempt to determine the scene type or have specific modes.