Cities: Skylines - Snowfall

Summary pulled directly from Steam - Some text may only be applicable to Steam platform

In Snowfall, players’ cities will be covered in snow or
glisten in the rain thanks to a new in-game weather system, while their civic expertise
is tested by the new challenges of running a city when the temperature falls.
Snowplows will clear the streets, heating systems will run from home to home, and
new trams will shuttle citizens about town in an improved public transit interface. All
of these features will keep players on their toes – while their cities twinkle in the snow
under new weather visuals.

Key Features:

Now is the Winter of This Content:

Rain and fog for existing maps, plus a new “Winter” map theme with snow and all of its challenges

The Streetcars You Desire:

Expanded public transportation options, including easier management of existing lines – and Trams, a new system demanded by fans

World Warmth, Too:

Cold weather increases demands for electricity, unless new water-based heat systems are in place

Plowers to the People:

Build a snowplow depot to keep traffic flowing during winter weather, and employ new road maintenance systems to keep your streets in shape

New Chirps:

#yeahthereare