If you close the windows and snuggle up in the front corner of the cab it isn't too bad. Fortunately there's plenty of heat to dry you out.
Leaning out of the cab on the push north isn't too nice without the awning. The roof drips right on your head.
I feel for the brakeman more on the push up to the end of track, though. Been there, done that. It's not much fun especially if you wear glasses or it's chilly out.