Hm... I am uncertain.
Of course, I am not sure I'd see him as I always have blinds and curtains on said windows. So at the most, probably it'd be more likely to see their shadow. As I also do not make it a habit to peek out through the blinds when it's nightfall.
In any case, I'd probably get on the phone to call someone whilst moving to where my fam is. If I'm home alone, I'm doing the same whilst waiting. Because if I hear him coming in, I'm either planning to get the hell out of dodge or hiding in an area I'm pretty sure he can't get to.
Like under the stairs.