Foel Gron weather forecast.

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

A mixed day on Foel Gron: 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. Little or no rain expected.

A fine day on Foel Gron: summit wind broadly 5-20 mph, with gusts 15-25 mph during the afternoon (a moderate breeze). Any cloud sits well above the tops (base 1000-1600 m) - clear summits. Little or no rain expected. Confidence moderate - the forecast models differ somewhat (the forecast models show a moderate spread), so treat the numbers as a guide.

Cloud-free timing: Around 50% early, improving to around 100% later.

A fine day on Foel Gron: summit wind broadly 10-25 mph, with gusts 25-35 mph during the evening (fresh and blowy). Any cloud sits well above the tops (base 400-1100 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Confidence moderate - the forecast models differ somewhat (the forecast models show a moderate spread), so treat the numbers as a guide. Treat the cloud base with caution - the models disagree on humidity, so it could be well above or below the figure given.

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

A fine day on Foel Gron: summit wind broadly 5-20 mph, with gusts 10-20 mph early in the morning (a moderate breeze). Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. 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 Foel Gron: summit wind broadly 5-25 mph, with gusts 20-30 mph early in the morning (fresh and blowy). Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base around 500-800 m in the morning, lifting to 1100-1400 m around midday and 1200-1500 m by late afternoon. The top is likely to drift in and out of cloud; views may come and go. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Low confidence - the models disagree markedly (the forecast models are widely spread); 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.

A fine day on Foel Gron: summit wind broadly 10-25 mph, with gusts 20-30 mph early in the morning (fresh and blowy). Any cloud sits well above the tops (base 1100-1600 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin.

Cloud-free timing: Around 75% early, falling to around 20% later.

A mixed day on Foel Gron: summit wind broadly 15-25 mph, with gusts 25-35 mph early in the morning (fresh and blowy). 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. Cloud base around 800-1100 m in the morning, 1000-1300 m around midday and 600-900 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from the morning into the afternoon. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Low confidence - the models disagree markedly (the forecast models are widely spread); 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.