Place outdoor attractions during the brightest noon hours, using museums, meals, or hotel intervals as a warming interval. Leave a night to handle weather changes.
Dress systematically
Warmth comes from layering, dry socks, gloves that can also operate your phone, and non-slip shoes. Test the full set before going outdoors for long periods.
Protect limited sunlight
Winter light is precious. Plan your tickets, transportation, and breakfast well, and don't waste your most clear outdoor time waiting in line.