In this strange complex of time and space anything can happen

It's a bit ambiguous, actually. Yes, there is a Latin word 'par' which means 'equal', but there's also a Latin prefix 'para' which means 'beyond' or 'against'. Meanwhile, there's the Greek 'para' meaning 'alongside of', 'beside' or 'beyond'. So basically the Latin 'para' is borrowed from the Greek 'para'. The meaning does alter slightly in the process, but it's very much related, and it's anyone's guess which we're dealing with in any given modern English word.

I suppose it's safest to say we're using the Latin root in a word otherwise composed of Latin elements, like 'paranormal', and the Greek one in a word otherwise composed of Greek elements, like 'paradox'. In which case, we can happily say 'paratemporal', and pass it off as a wholly Latin-derived word. :-)