Ben Challum weather forecast.

Cloud-free timing: Around 0% early, improving to around 67% later.

A mixed day on Ben Challum: summit wind broadly 10-30 mph, with gusts 30-40 mph early in the morning (strong winds). The ground is likely to be wet after recent rain. 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 1500-1800 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 the morning into the evening. Cloud is likely to hang lowest on northwestern slopes; the southeastern 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 -2 to 2°C in the wind - wrap up.

Cloud-free timing: Around 0% early, improving to around 83% later.

A rough, clagged-in day on Ben Challum: summit wind broadly 30-45 mph, with gusts 55-65 mph during the evening (storm-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 500-800 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 during the evening. Cloud is likely to hang lowest on southwestern slopes; the northeastern side should see somewhat higher bases and better breaks. Some rain is likely, with around 2-5 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. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 25-49 mph, so treat the headline as mid-range.

A rough, clagged-in day on Ben Challum: summit wind broadly 30-50 mph, with gusts 60-70 mph during the morning (storm-force winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 700-1000 m in the morning, lowering to 500-800 m around midday and 500-800 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 southwestern slopes; the northeastern side should see somewhat higher bases and better breaks. A persistently wet day is possible, with around 10-20 mm indicated; local totals could vary considerably. Cold on top: air temperature broadly 6 to 10°C, feeling around 0 to 4°C in the wind - wrap up. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 27 to 54 mph; check again nearer the time.

A grey, cloudy day on Ben Challum: summit wind broadly 20-35 mph, with gusts 35-45 mph early in the morning (gale-force winds). The ground is likely to be wet after recent rain. There could be a spate risk based on forecast rainfall. Burns and unbridged crossings may rise quickly. Most likely from around 00:00 until around 02:00 the following day. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 500-800 m in the morning, 900-1200 m around midday and 700-1000 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 (ensemble members are widely spread) - the summit peak could be anywhere from 18 to 42 mph; check again nearer the time.

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

A mixed day on Ben Challum: summit wind broadly 5-20 mph, with gusts 15-25 mph early in the morning (fresh and blowy). The ground is likely to be wet after recent rain. Cloud base around 500-800 m in the morning, lifting to 1500-1800 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 around midday into the evening. 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. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 8 to 26 mph; check again nearer the time.

Cloud-free timing: Around 0% early, improving to around 33% later.

A grey, cloudy day on Ben Challum: summit wind broadly 10-30 mph, with gusts 30-40 mph during the evening (strong winds). The ground is likely to be wet after recent rain. Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base around 600-900 m in the morning, 3100-3400 m around midday and 900-1200 m by late afternoon. 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. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 15 to 35 mph; check again nearer the time.

Cloud-free timing: Around 50% early, falling to around 0% later.

A rough, clagged-in day on Ben Challum: summit wind broadly 25-40 mph, with gusts 40-50 mph during the morning (gale-force winds). A meaningful thunderstorm risk is indicated from the morning into overnight. Avoid committing to exposed ridges if storms begin to build. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base mostly around 500-800 m through daylight. Expect clag for much of the day, though a brief clearance is possible early in the morning. Cloud is likely to hang lowest on southern slopes; the northern 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. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 17 to 61 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.