I'm in Abu Dhabi it never gets that cold. The differential would be nasty in Summer. We have chilled water systems otherwise we'd have boiling water coming out of the cold taps. So it could be up to 50degc outside and <5degc coming out of the tap. My balls just disappeared into my guts thinking about it!If you can do it Snags.
I know it’s hard in Winter but with anything once you do it another of times it becomes easier to handle the feeling of discomfort.