Ben Challum weather forecast.

Cloud-free timing: Around 0% early, improving to around 80% later.

A mixed day on Ben Challum: summit wind broadly 15-30 mph, with gusts 30-40 mph during the evening (strong winds). 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 800–1100 m around midday and 1000–1300 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening. Cloud is likely to hang lowest on southeastern slopes; the northwestern side should see somewhat higher bases and better breaks. Little or no rain expected. Cold on top: air temperature broadly 4 to 8°C, feeling around 0 to 4°C in the wind - wrap up. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 23-29 mph, so treat the headline as mid-range.

Cloud-free timing: Around 0% early, improving to around 80% later.

A wild day on Ben Challum: summit wind broadly 25-40 mph, with gusts 40-50 mph during the evening (gale-force winds). 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 1000–1300 m around midday and 1500–1800 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from midday into the afternoon. Cloud is likely to hang lowest on southeastern slopes; the northwestern side should see somewhat higher bases and better breaks. Little or no rain expected.

Cloud-free timing: Around 0% early, improving to around 40% later.

A grey, cloudy day on Ben Challum: 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 500-800 m in the morning, lifting to 900-1200 m around midday. The top is likely to drift in and out of cloud, with the best chance of a view during the afternoon. Little or no rain expected. Confidence moderate (Summit wind could be roughly 16-32 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 16-32 mph, so treat the headline as mid-range.

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

A grey, cloudy day on Ben Challum: summit wind broadly 10-25 mph, with gusts 20-30 mph during the evening (fresh and blowy). A meaningful thunderstorm risk is indicated from late afternoon into the evening. Avoid committing to exposed ridges if storms begin to build. Cloud base around 400–700 m in the morning, then around 900–1200 m around midday and 600–900 m by late afternoon. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Cloud is likely to hang lowest on northern slopes; the southern side should see somewhat higher bases and better breaks. Some rain is likely, with up to around 2 mm indicated; timing and local totals remain uncertain. Confidence moderate (Summit wind could be roughly 13-26 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 13-26 mph, so treat the headline as mid-range.

Forecast confidence: Rain is possible, but forecast models differ by about 12 hours on when it arrives.

Cloud-free timing: Around 0% early, improving to around 80% later.

A grey, cloudy day on Ben Challum: summit wind broadly 0-15 mph, with gusts 10-20 mph early in the morning (a moderate breeze). Cloud base around 200–500 m in the morning, lifting to 600–900 m around midday and 1300–1600 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening. Some rain is likely, with up to around 2 mm indicated; timing and local totals remain uncertain.

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Cloud-free timing: Around 0% early, improving to around 80% later.

A mixed day on Ben Challum: summit wind broadly 5-15 mph, with gusts 10-20 mph early in the morning (a moderate breeze). A meaningful thunderstorm risk is indicated from the morning into the afternoon. Avoid committing to exposed ridges if storms begin to build. Cloud base around 400–700 m in the morning, lifting to 900–1200 m around midday and 1300–1600 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain.

Forecast confidence: A low thunderstorm risk remains difficult to time precisely.

A grey, cloudy day on Ben Challum: summit wind broadly 15-35 mph, with gusts 35-45 mph during the evening (gale-force winds). Thunderstorms are possible from early morning into the evening. Keep an escape route from exposed ridges and descend if thunder develops. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 400–700 m through the morning, lifting to 900–1200 m by late afternoon. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Cloud is likely to hang lowest on western slopes; the eastern side should see somewhat higher bases and better breaks. Some rain is likely, with around 5-10 mm indicated; timing and local totals remain uncertain. Cold on top: air temperature broadly 4 to 8°C, feeling around -2 to 2°C in the wind - wrap up. Low confidence (Summit wind could be roughly 18-53 mph, which changes how difficult exposed walking may feel) - the summit peak could be anywhere from 18 to 53 mph; check again nearer the time.