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In the early to mid eighties I read a short story or possibly a novel set on a Venus that was being terraformed. Based on what I was reading at the time I suspect it was published in the late sixties or early seventies but I can't be sure. Think Heinlein, Asimov etc.
All I really remember was that there was constant rain and the main character was traveling (on foot I believe) then he stopped at one of a series of domed hostel type things to refresh and escape the rain.
This might be from a different story but I think the only habitable parts of the planet were very large, deep canyons. The actual surface wasn't habitable.