Facebook‘s default temperature scale is Celsius.
If you prefer, you can change that. Here’s how you can do it on a PC:
Sign into Facebook.
Hit the “Inverted triangle” icon at the top right.
Click on Settings & privacy > Settings.
Hit Language and Region in the left sidebar.
You can see Edit next to Temperature on the right. Hit it.
Open the drop-down list and you will see these two options:
Pick the one you prefer.
Hit the Save Changes button.
That’s all there is to it.
Language and Region can also be accessed by following these steps:
Log in to your Facebook account.
At the top right, click the inverted triangle.
Click on Settings & Privacy > Language.