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Cornwall weather: Saturday 26 September, sunshine before the rain

Published On: 26 September 2026Last Updated: 26 September 2026By
CornishStuff Cornwall weather forecast graphic for Saturday 26 September

A fine start to the weekend is on the cards, so if you have been waiting for a dry day to get things done, this is the one to use. Cornwall shares in a warm and largely sunny Saturday before the weather turns from Sunday, when heavy rain and stronger winds move in. Here is how the weekend and the week ahead shape up, taken from the Met Office regional forecast for South West England, which covers Cornwall.

Below is the outlook for the days that matter most for planning the week’s weather around Cornwall.

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Today (Saturday 26 September)

Largely dry across the region with fine spells of sunshine. There is a small chance of the odd shower in the afternoon, but most places stay dry and pleasantly warm, with a high around 20°C. If there is a walk, a job in the garden or a trip to the beach on your list, today is the day for it.

Tonight

Skies stay clear at first and it turns chilly, with the temperature dropping to a minimum of around 8°C. A few mist and fog patches are possible, and cloud builds a little towards the end of the night. Worth taking a jacket if you are heading out late.

Sunday 27 September

A dry but largely cloudy start, then the change everyone will feel. Heavy and persistent rain arrives later in the day, with strengthening winds behind it. Temperatures stay mild, reaching around 21°C, though it will feel cooler once the rain sets in. A day for indoor plans and a good waterproof.

Your daily dose of Cornwall

News, events and goings on across the Duchy

Outlook: Monday to Wednesday

Monday looks pleasant, with spells of warm sunshine and light winds. Tuesday turns windier and unseasonably warm, with some rain arriving later in the day. Wednesday feels fresher and breezier, a mix of sunshine and showers.

The pattern through the week is a warm but unsettled one, the kind of late-September spell where the wind and rain keep shifting from one day to the next. Tuesday is the one to keep an eye on, with unusual warmth and strengthening winds arriving together.

Weather collage showing lightning, cloud and sunshine over Cornwall

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