Cold Weather Bathing

[Pete Jasinski]

It's pretty cold here in NJ lately and I've been worried about Dudley getting wet when it's freezing or below. I know the the ferals get wet in the rain outdoors but just to be on the safe side I want to know at what temp I shouldn't let him get wet.
I know it's not the best for birds but every now and then I blow dry him and he loves it! any input would be greatly appreciated!
Thank you,
Pete and Dudley