toFixed() doesn't seem to work... why?

Number.toFixed() returns a string with the specified format.

What you would want to do is:

var tfixed = temp.toFixed(2);  
    console.log("Temp: " + tfixed);
    return temp; //we probably want to return the number, not a string

or

    console.log("Temp: " + temp.toFixed(2));
    return temp;