Rain Storm

Rain storms are not particularly dangerous to adventurers, unless they occur in a location where the weather can cause other hazards.

Light Rain: Light Rain increases the Difficulty of Balance and Climb checks by 1.

Heavy Rain: Heavy Rain increases the Difficulty of Balance and Climb checks by 1 and causes Slippery Terrain [Balance DC 10]. Additionally, it grants Partial Concealment to all creatures and imposes a -4 penalty to Spot checks.

Heavy Rain can often be accompanied by a Wind Storm.