I'm glad those things don't survive well in Finland.
Interestingly, I don't think I've seen a single cockroach since moving back to TN. I think that's more due to the cleanliness state of my family's home than the humidity though; we had them in AZ.
I think it's less high vs. low humidity and more heat vs. cold. They're probably here in less sanitary places in the summer and the warmer parts of spring but probably burrow away into hibernation once autumn hits.
I didn't have a winter last year. I'm half looking forward to it, half dreading it this year.
We had one, but it was blessedly mild compared to the hellish ice-storm they had here in 2010, before I moved here that spring. However, as cold as it's gotten already compared to last year, I imagine this winter will be much, much less forgiving.
I already have the big coat out. I imagine I'll be wearing it before the end of the month. As it is I'm already wearing long sleeves every day I can and usually turning on the heater at work.