Weather permitting cedar siding stain?

I just purchased this house with neglected cedar siding. There is not much stain left, so you almost see bare wood. There are some areas with mildew. The boards are still sound, though. Since it's getting colder each day here in MN, should I get it power washed and stained immediately, or wait till next year to do it? It's going to be dry for the next 10 days according to the weather forecast, but temperature will be low 50s during the day (only a few hours) and high 30s at night. I guess this week will be the last window to get it done this year, if at all possible. But is it worth it to push it? Will the snow get the wood in even worse shape if I don't do something immediately? Or I'll end up with a bad job anyway since it's too cold if I try this year? Thanks!