Sometimes it depends. Something like the OR Solitude pants is often what you would need for 80-90% of your days.

On days that are ugly cold (where you wonder why are you even out) or when its really warm (and you wonder if its sane to be climbing since the climb could collapse- which I've seen and its spookie to have just walked away from it) and the climb is running with water; then the hardshells are often appropriate.