The developers of Escape from Tarkov are actively preparing for winter, and also intend to add a new season system to the game.
Battlestate Games boss Nikita Buyanov recently outlined some plans:
[...] we plan to use these few months to prioritize and bring more fixes and improvements to the game. Winter will also come to Tarkov, new story quests and a new event will appear. A little later, a seasonal character will be introduced along with a completely new season system.
In December, the Escape from Tarkov developers will hold the traditional New Year's TarkovTV — and then share additional information.