From t'other thread I know Three Nine was there a few days back and did Bo Bridges. If that's dry anything on the arch itself will definitely be bone dry. Fairly sure there's been no rain to speak of in the meantime (a check on the rain gauge data on buxtonweather.co.uk would pretty much confirm this). It takes a lot of rain to muck up Arch Enemies if that's your plan. I climbed it in persistent pouring rain.