What does the man mean?

W: If the weather tomorrow is as hot as today, we may as well give up the idea of playing tennis in the afternoon.
M: Oh. I don’ t dunk it’ll last long. The weather forecast says it will cloud-over by mid-afternoon.

M: I need this document to be printed out right now. I will use it in the meeting.
W: OK. I will give you in a minute.