Cloud-free timing: Around 25% early, improving to around 100% later.
A fine day on Rhobell Fawr: summit wind broadly 10-25 mph, with gusts 25-35 mph early in the morning (fresh and blowy). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud is likely to hang lowest on western slopes; the eastern side should see somewhat higher bases and better breaks. Little or no rain expected.