Mist is dangerous too, but I have taken a t1i out in continuous, moderate rain and not had any problems. However it was attached to an L series lens and I made sure to dry it thoroughly before opening up the battery or memory compartments. I also packed it in with desiccant packets (silica) at the end of the day leaving the battery & memory compartments open so any internal moisture could be wicked up.
Had I had the choice at the time, I would have bought one of the cheap $30 to $100 rain covers (they type your hands slip under to directly grip the camera, or would even put it in a "waterproof" bag ($70 to $200).
I'd be more concerned about a non-L lens as, especially a zoom, as the working of the controls may allow water to work its way in.