I agree with Ziemas regarding the weather. Bike is my primary means of transportation, meaning it will go out there in rain and snow if I need to. Most often I will not be able to park it indoors. And when I'm home, it will be in storage room (no rain or snow, but well below 0C in winter).
To compensate, I am willing to put time and effort into maintenance and cleaning, when that is needed.
So far I have not had particular issues with rust or freezing. I have an alu bike for summer use and an old steel bike for winters.
--J