Temperatures can be divided and multiplied.

[xorgy]

The README says:

Some values cannot be multiplied or divided (e.g. ºC, ºF, pH, dB).

But as far as I'm concerned, temperatures in these units can be multiplied and divided.
The way to multiply a temperature in °C is to add 273.15 to it beforehand.
With Fahrenheit, the same applies but the base is 459.6̅6̅6 instead.

Temperatures are usually written with relative figures, but they are still absolute values.