Not odd - Garmin artifical restrictions. I.e. battery is only symbol, but internally % is available. Seems CIQ datafields still can use all available. So ie. one of my CIQ datafields shows battery level in %. So you may like to look for a CIQ datafield supporting tempreture.
Despite that temperature is availabe by weather notification.
As mentioned - other option is to check for a CIQ datafiled offering temperature.
If it's the forecast weather you are referring to it does display on the 130. There is even weather screen that you can display during rides.