And not only to make sure the humidity is gone but to get to the same temperature as the computer. Remember, almost anything breaks or is stressed when going from one temperature extreme to another.The cold weather is not that of a problem. But don´t unbox it and power it on in your warm room right after getting it in. Let it acclimatize for about 3 hours or over night to be sure humidity is gone.
There's a post around here recently about a cpu sent in the mail left over night in the mailbox, in Alaska think it was. Temps was said to be -40. There was condensation inside the packaging so they dried it and left cpu be in better conditions. Using rice to absorb any remaining moisture was also considered.
Cpu ran fine when they got around to installing it.