From the secondary navigation on any forecast page (Current, Hourly, 7 Days, 14 Days, Weekend, Monthly), click on the Three Dots to the right of the screen , then select the units you want to display (Celsius or Fahrenheit).
From the secondary navigation on any forecast page (Current, Hourly, 7 Days, 14 Days, Weekend, Monthly), click on the Three Dots to the right of the screen , then select the units you want to display (Celsius or Fahrenheit).