How do you change the weather on the toolbar from Fahrenheit to Celsius?

I live in Toronto and want the temperature to be shown in degrees celsius. We do not use Fahrenheit in Canada, it's only USA that uses it, I don't understand why it has to be in Fahrenheit by default. Someone show me how to change it please.



Thanks. Much appreciated.How do you change the weather on the toolbar from Fahrenheit to Celsius?
I read your additional details to Igor. Maybe you are not using the latest version of the Yahoo toolbar at toolbar.yahoo.com. You might try re-installing the Yahoo toolbar. Also, sure you are not getting transferred to web page http://weather.yahoo.com/

That requires a different procedure to get the temp in Celsius.How do you change the weather on the toolbar from Fahrenheit to Celsius?
Click the down arrow to the right of the weather icon on the Yahoo toolbar. Click Add Location. Look for Display Temperature In. Click the Celsius radio button, click Save.