When the Met office weather site says ‘partly cloudy with sunny intervals’ and the great big black lowering cloud hanging over the hill says ‘pissing down shortly’?
Go with the cloud.
Also, those little contour lines on the maps? It’s always best to look at them before planning your route, and not, say, after you’ve come home cold, wet, and with shaking legs.
Looking on the bright side, however, I have not yet been savaged by any cats.