Carnedd Dafydd weather forecast.

Cloud-free timing: Around 0% early, improving to around 100% later.

A mixed day on Carnedd Dafydd: summit wind broadly 10-30 mph, with gusts 30-40 mph early in the morning (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 600-900 m in the morning, lifting to 1000-1300 m around midday and 1400-1700 m by late afternoon. The top is likely to drift in and out of cloud; views may come and go. 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. Cold on top: air temperature broadly 2 to 6°C, feeling around -2 to 2°C in the wind - wrap up.

Cloud-free timing: Around 25% early, improving to around 100% later.

A fine day on Carnedd Dafydd: summit wind broadly 10-20 mph, with gusts 20-30 mph during the morning (fresh and blowy). Cloud base around 800-1100 m in the morning, lifting to 1500-1800 m around midday. The top is likely to drift in and out of cloud; views may come and go. Little or no rain expected.

A mixed day on Carnedd Dafydd: summit wind broadly 20-30 mph, with gusts 30-40 mph during the morning (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 1500-1800 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 18 to 34 mph; check again nearer the time. Treat the cloud base with caution - the models disagree on humidity, so it could be well above or below the figure given.

A fine day on Carnedd Dafydd: summit wind broadly 10-25 mph, with gusts 25-35 mph early in the morning (fresh and blowy). Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 1400-1800 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 14 to 33 mph; check again nearer the time. Cloud base is the least certain part of this - the models are only moderately agreed, so it could sit a couple of hundred metres either way.

Cloud-free timing: Around 0% early, improving to around 100% later.

A mixed day on Carnedd Dafydd: summit wind broadly 5-25 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 base around 500-800 m in the morning, lifting to 1400-1700 m around midday and 1400-1700 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from around midday into the evening. Little or no rain expected. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 15 to 37 mph; check again nearer the time.

A fine day on Carnedd Dafydd: summit wind broadly 10-25 mph, with gusts 20-30 mph during the afternoon (fresh and blowy). Any cloud sits well above the tops (base 1500-1900 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 10 to 26 mph; check again nearer the time.

A mixed day on Carnedd Dafydd: summit wind broadly 20-35 mph, with gusts 40-50 mph early in the morning (gale-force winds). Thunder watch from the afternoon into overnight: a small but credible risk is present. Watch for growing clouds and leave exposed tops if thunder develops. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 1500-1900 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 19 to 46 mph; check again nearer the time. Cloud base is the least certain part of this - the models are only moderately agreed, so it could sit a couple of hundred metres either way.