Tom a' Chòinich weather forecast.

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

Cloud-free timing: Cloudy early, clearing later.

A mixed day on Tom a' Chòinich: summit wind broadly 10-25 mph, with gusts 20-30 mph early in the morning (fresh and blowy). Cloud base around 500–800 m in the morning, lifting to 1200–1500 m around midday and 1400–1700 m by late afternoon. Summit cloud should lift later, bringing a better chance of clear views. Little or no rain expected.

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 20% later.

A grey, cloudy day on Tom a' Chòinich: summit wind broadly 10-30 mph, with gusts 25-35 mph early in the morning (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base mostly around 600–900 m through daylight. Expect clag for much of the day, though a brief clearance is possible during the evening. Cloud is likely to hang lowest on northeastern slopes; the southwestern 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. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 17-29 mph, so treat the headline as mid-range.

Forecast confidence: Rain is possible, but forecast models differ by about 14 hours on when it arrives.

A grey, cloudy day on Tom a' Chòinich: summit wind broadly 0-15 mph, with gusts 5-15 mph during the evening (a moderate breeze). Cloud base around 400-700 m in the morning, lifting to 800-1100 m around midday. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Little or no rain expected.

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

A rough, clagged-in day on Tom a' Chòinich: summit wind broadly 10-20 mph, with gusts 20-30 mph during the afternoon (fresh and blowy). A meaningful thunderstorm risk is indicated from the morning into the evening. Avoid committing to exposed ridges if storms begin to build. Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base around 400–700 m through the morning, lifting to 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 southern slopes; the northern side should see somewhat higher bases and better breaks. A persistently wet day is possible, with around 5-10 mm indicated; local totals could vary considerably.

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

Cloud-free timing: Best around midday at about 50%; around 0% early and 0% later.

A grey, cloudy day on Tom a' Chòinich: summit wind broadly 5-30 mph, with gusts 35-45 mph during the evening (strong winds). A meaningful thunderstorm risk is indicated from early morning into the evening. Avoid committing to exposed ridges if storms begin to build. Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base around 600–900 m in the morning, then around 1200–1500 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 midday into the afternoon. 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 5-10 mm indicated; timing and local totals remain uncertain. Confidence moderate (Summit wind could be roughly 18-44 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 18-44 mph, so treat the headline as mid-range.

Forecast confidence: Rain is possible, but forecast models differ by about 14 hours on when it arrives.

Cloud-free timing: Around 0% early, improving to around 20% later.

A grey, cloudy day on Tom a' Chòinich: summit wind broadly 20-35 mph, with gusts 35-45 mph around midday (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 400-700 m in the morning, lifting to 900-1200 m around midday. Expect clag for much of the day, though a brief clearance is possible during the evening. 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 around 2-5 mm indicated; timing and local totals remain uncertain. Cold on top: air temperature broadly 2 to 6°C, feeling around -2 to 2°C in the wind - wrap up. Confidence moderate (Summit wind could be roughly 19-35 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 19-35 mph, so treat the headline as mid-range.