The bikes still look fine, exactly where you left them. It's a bit of a ride back to Stenhamra but with the thought of some nice warm place to warm up for a while, you should be able to make it there.
OOC:
You also have your hideout, the old magnetrine ship, outside the city. I would assume you have some way to heat it so it's useable in winter.
If you head there, any of you with conditions could try to heal them as you discuss your next steps