In my new scale, °X, 0 is Earths' record lowest surface temperature, 50 is the global average, and 100 is the record highest, with a linear scale between each point and adjustment every year as needed.
https://media.mastodon.com.br/media_attachments/files/113/347/894/123/446/612/original/26b0a12141e35e2a.png