Cairnsmore of Carsphairn weather forecast.

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

Cloud-free timing: Around 100% early, falling to around 60% later.

A mixed day on Cairnsmore of Carsphairn: summit wind broadly 15-30 mph, with gusts 35-45 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 900-2000 m) - clear summits. Little or no rain expected.

Forecast confidence: Forecast models disagree on whether meaningful rain reaches the hills during 10:00-16:00.

A grey, cloudy day on Cairnsmore of Carsphairn: summit wind broadly 10-30 mph, with gusts 30-40 mph during the evening (strong winds). High spate risk based on forecast rainfall. Burns and unbridged crossings may become difficult or impassable. Most likely from around 00:00 until around 13:00. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 100-400 m in the morning, lifting to 400-700 m around midday. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Cloud is likely to hang lowest on northwestern slopes; the southeastern 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 (Summit wind could be roughly 19-32 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 19-32 mph, so treat the headline as mid-range.

Forecast confidence: The broad weather pattern is useful, although some detail may change.

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

A grey, cloudy day on Cairnsmore of Carsphairn: summit wind broadly 5-20 mph, with gusts 15-25 mph early in the morning (a moderate breeze). The ground is likely to be wet after recent rain. Cloud base around 400-700 m in the morning, lifting to 600-900 m around midday. The top is likely to drift in and out of cloud, with the best chance of a view during the afternoon. 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: Best around midday at about 75%; around 0% early and 0% later.

A grey, cloudy day on Cairnsmore of Carsphairn: summit wind broadly 15-30 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 5-15 mph in the valley, rising towards the tops. Cloud base around 100–400 m in the morning, then around 1300–1600 m around midday and 400–700 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 southern slopes; the northern 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 (Summit wind could be roughly 23-36 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 23-36 mph, so treat the headline as mid-range.

Forecast confidence: Summit wind could be roughly 45-65 mph, which changes how difficult exposed walking may feel.

A rough, clagged-in day on Cairnsmore of Carsphairn: summit wind broadly 40-60 mph, with gusts 75-85 mph during the afternoon (storm-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 03:00 the following day. Much calmer lower down - generally 15-25 mph in the valley, rising towards the tops. Cloud base mostly around 400–700 m through daylight. 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. A persistently wet day is possible, with around 10-20 mm indicated; local totals could vary considerably. Cold on top: air temperature broadly 4 to 8°C, feeling around -4 to 0°C in the wind - wrap up. Low confidence (Summit wind could be roughly 45-65 mph, which changes how difficult exposed walking may feel) - the summit peak could be anywhere from 45 to 65 mph; check again nearer the time.

Forecast confidence: Summit wind could be roughly 35-53 mph, which changes how difficult exposed walking may feel.

A rough, clagged-in day on Cairnsmore of Carsphairn: summit wind broadly 35-50 mph, with gusts 60-70 mph around midday (storm-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 23:00. Much calmer lower down - generally 15-25 mph in the valley, rising towards the tops. Cloud base mostly around 400–700 m through daylight. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Cloud is likely to hang lowest on northwestern slopes; the southeastern side should see somewhat higher bases and better breaks. A persistently wet day is possible, with around 20-40 mm indicated; local totals could vary considerably. Cold on top: air temperature broadly 2 to 6°C, feeling around -4 to 0°C in the wind - wrap up. Confidence moderate (Summit wind could be roughly 35-53 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 35-53 mph, so treat the headline as mid-range.