Guess there's not much need. Most of the prefixes used are 1000 (kilo, mega, etc.) or 1/1000 (milli, micro, etc). The tens and hundreds are a bit odd to use and imo shouldn't be used. So there's no need to use prefixes until you're into Star temperatures or really extreme experiments.

prefix

You mean suffix? Usually the C or F (or K for that matter) are denoted last, not first.

I usually do

46°C instead of 46° ???

I feel very dumb and American for never realizing this was a thing.

It's really when you get into the thousands though that SI prefixes generally start to be used, you don't see deca or hecto used that often. It's mainly because we're usually happy keeping three digits of precision in general conversation (185 degrees C, 250 metres, etc). After that we get a bit sloppy and start rounding, and that's where kilo comes in and we start talking about "1.25 kilometres" and such.

Add in the fact that people rarely need to describe temperatures higher than 1000 degrees C with any precision, (they'll just round to hundreds/thousands/millions usually) and that's why SI units feel weird with temperature.

Because physics uses Kelvin for high temperatures, and electron volts for really high temperatures.

Would just be confusing. Temperatures above a few hundred degrees have no place in most people's daily lives, so that would be mostly for scientific notations, and scientists use Kelvin anyway for precision.

Give it a few kilomonths

I want to see this.

I'm gonna be the change I want to see.

Because kilodegrees sounds funny. But megadegrees really sounds volcano lair evil.