I can't find much of any rules for sleep in pathfinder, or at least the requirement for sleep. Specifically, what happens if you sleep with no bed (in the wilderness, etc)? What happens if you sleep in inclement weather? What happens if you don't sleep at all? Are there rules for these situations, and if not, does anyone have house rules for it that they like?
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The d20PFSRD collates the relevant bits conveniently for you here. They extrapolate on some aspects but the RAW bits are
and from the Armor Check Penalty section
As for inclement weather and the like, the weather section doesn't have instructions on how much it disrupts sleep but I'd think that anything that overcomes your +10 Perception DC when asleep would wake you up.