The calendar in Outlook 2013 had a nice feature that lets you see the weather forecast. But, it defaults to Fahrenheit for its measure of temperature. Here is how you can change the measurement to Celsius, if you prefer.
1. Click FILE, then “Options”.
2. Click the “Calendar” option in the left pane.
3. Scroll down to the “Weather” option. Here, you can select the “Show temperature in:” and switch from Fahrenheit to Celsius or vice versa.