[driftdiver]

Would zombies freeze in cold weather? Would freezing their brain kill them?

[Boogieman]

I think they’d probably just migrate. Or maybe they would dig in and hibernate.

[sean327]

In the book World War Z, the zombies froze in the winter but thawed and re-animated in the spring.

[Blood of Tyrants]

You would think that since the only organ operating was a malfunctioning brain, they would rot away to nothing inside a few months.

[Farmer Dean]

What about extreme desert heat,would they dry out and turn to dust?

[Smokin' Joe]

Would zombies freeze in cold weather?

yep.

Would freezing their brain kill them?

Nope. They're already dead, remember. It would slow them down until spring, though, and that would make winter the best time to go whacking zombies.