What is the woman suggesting?

M: What type of clothing should I take when I go to Sweden?
W: Some friends of mine were there last year and they said it can get pretty cool at night, even in the middle of summer.
M: Maybe I’ll pack a few sweaters then.

M: How long does it take to get to the airport?
W: If there’s no traffic, it’s about a twenty-minute drive.
M: The roads are probably crowded. We should leave soon.