different places, different experiences.
Current 6 degrees Fahrenheit in Nebraska, pretty sure my shower would freeze...
I could heat a gallon or two to use in a garden sprayer--I keep one or two around... If it comes down to it, I would be more worried about heating my KIDS than my water at this time of the year.
I agree with Les for Summetime....
Hmm.
I wonder if a camp shower would heat up from inside of my windows?