German New Year Question (Happy New Year! ): sentence translation about weather forecast

It should be said that there will be a temperature drop of 8 degrees to 1 degree tomorrow morning.

Auf and bis are not a combination.

German usually uses two prepositions auf and um to express quantitative change.

Auf is a certain value and um is a variable value.

For example, from one person to six people, you can say: auf 6 Personen

Five people have been added: well, five people.

What does Bis come from?

Abkuehlen, calm down