The data should be correct for the most part but mistakes or weird cases like pink rathian could happen. Lightweight published version full google sheets version reddit comment version i made a list of each monster and their respective tempered threat level.

Tempered Monsters Monster Hunter World Iceborne Wiki Guide
Monster hunter world tempered tier list. However this trick only works once a hunter has a quest so i have listed each monster and. The heavy bowgun is still putting other weapons in monster hunter world to shame and not just by a lil bit but by a whole lotta lotta bit. However with respect to the other weapons in the game this extensive tier list will give you all the facts and nothing but the facts of the best weapons to use in game. Their carves are the same as their high rank counterparts. These monsters deal more damage and have more health than their high rank versions. The quest details state what hr players have to be and using that information one can determine which tier it falls under.
Players will find tempered tracks while exploring but will not see the associated monster until they go into their. Tempered monsters in monster hunter world mhw are special creatures found in special quests. World on the playstation 4 a gamefaqs message board topic titled what are the tempered monsters tiers. Tempered monsters in monster hunter world are even more powerful versions of high rank monsters. Arch tempered monsters deal more damage and have more health than their tempered versions. Tempered monsters quick details.
Most players are unsure which monster falls under which tier and its pretty easy although kinda backwards.