It’s only our first hours into January 2020 and already Microsoft Flight Simulator is making news as they show off “Let it snow” which definitely answers the question on if the series will include snow effects.
Snow storms and snowy terrain

The new trailer starts by looking over Central Park, New York City with a snowless terrain but that changes quickly as snow moves in and begins falling – changing the landscape.

The new trailer doesn’t include any written information but it does answer if snow, both on the landscape and as part of the dynamic weather system, is part of the simulation.