Share your C/F Celsius or Fahrenheit letter display on top to be able to see which scale is used preferably switchable
Welcome to the Community, @user8453 
Currently, the temperature unit depends on the language selected on the Settings tab.
At the moment, you’re using English (UK). Since Celcius is a standard temperature unit for the UK, it’s displayed in your widget:
However, if you switch the language to English (US), the temperature unit will be Fahrenheit:
Please let me know if this clears things up or if you have any further questions 