How to delete temp files

I don't know where they're located. I assumed they're temp/junk files because they are labeled as other on the storage info screen.

Oddly, you have assumed wrongly.

Other is just stuff that Spotlight couldn't identify, rightly or wrongly.

Use a tool that can actually help you find what is using up your storage.

GrandPerspective has a graphical display.

OmniDiskSweeper has a numeric/hierarchical display.

Use the one that works best for you and don't delete system files willy-nilly.

By "Temp files", do you mean junk files?

One way I know of is by using a cleaner application. There are many listed on App Store but I am using Cleaner One.

temp files should be auto deleted when the app that created them is done using them.

Where are the temp files you want to remove?