Thousands of spiders "rained" on an Australian town this week. It's not literal rain, but sometimes spiders like to put their butts in the air and float on silken threads, and let the wind carry them to better places. This behavior is called "ballooning." When it's a large amount of spiders, it's colloquially referred to as "spider rain."
If you're worried about the chances of spider rain coming to a town near you, rest assured! There's a very small number of places where this will never happen.
Of course, there are many places where it could happen. The red areas encompass all the places where you are not safe:
Is there good news? Yes. Spiders do not like extremely cold weather. You could move to Antarctica to escape spiders — at least before the continent melts away.
Spiders avoid the coldest northernmost areas of Earth, too. For example, they will only follow you to the beaches of Iceland before you can escape them, or until about minus 7° Celsius, whichever comes first.