Was out bouldering at rubicon until noon today. (That was all wet apart from three tier test piece area and the 5 holds on BSD.) It was chucking it down on the way there, sleet and everything. And itís drizzling in s17 now, with low cloud / mist rolling in from Totley Moor when I was out on my run.
So I would say close to zero chance of dry grit tomorrow.