Close off the front vent by reversing it and I would also turn the white plastic tray upside down because of your cold Winter.
Cheers from tropical Queensland, Australia
I leave ventilation up to the bees. So I leave their one entrance (mine is at the top) reduced all year around. I would also close up the bottom if it is screened, also all year around. Bees are very good at ventilating their hive without us creating more ventilation than they need or making it difficult for them to cool things when they need to. Too much ventilation will not only make them too cold in winter, but too hot in summer since they are air conditioning the interior.