If there was weather patterns that blew winds from either side to the terminator zone it would be very unpleasant. Imagine artic winds except way colder or hotter
Many gases and liquids would freeze and settle on the cold side of a tidal locked planet, wouldn’t they? The planet might slowly dry out
Brian Lumley write a series of horror novels back in the 80s and 90s that had such a world.
https://en.m.wikipedia.org/wiki/Necroscope_III:_The_Source Was written in 1989. Kind of cool.