Cornwall weather: Monday 21 September, a dry sunny week ahead

If you have been waiting for a proper stretch of autumn sunshine, this is your week. Cornwall wakes up under clear skies on Monday and holds onto them, with dry days and temperatures parked around 20°C almost all the way to the weekend. Here is how the week’s weather shapes up, and the one day the wind has other ideas.

Today (Monday 21 September)

Sunny from the off. The high reaches 20°C and it feels a touch warmer at 21°C in the light air, with winds barely stirring at gusts of 9mph. The chance of rain sits under 5%, so this is about as dependable as a September day gets. If you can get outside, do.

Tonight

Clear skies hang around after dark and the temperature slips back to around 9°C. A cool, quiet night, worth a jumper if you are out late.

Tuesday 22 September

More of the same, which is no bad thing. Another sunny day with a high of 20°C, an overnight low of 11°C, and the rain chance again under 5%. Winds stay gentle with gusts around 12mph.

Wednesday 23 September

The one day the settled feel loosens a little. Sunny intervals rather than wall-to-wall blue, a high of 19°C that feels closer to 18°C, and a small 10% chance of a shower around 9am. The bigger change is the wind, with gusts jumping to 23mph, so expect it to feel fresher along the coast.

Thursday 24 September

Back to full sunshine and 20°C by day, with a mild night to follow at 14°C. Rain stays off the table at under 5%, though the breeze holds on with gusts near 22mph.

Friday 25 September

Sunny intervals to round off the working week, 20°C and feeling every degree of it. There is a passing 10% chance of a shower in the small hours around 4am, then it dries up, and the wind eases back to gusts of 17mph.

The weekend and outlook

Saturday keeps the run going on paper, sunny intervals and 20°C with a mild low of 15°C. But there is a first proper hint of change, a 20% chance of a shower creeping in by around 7pm and gusts back up near 22mph. After a week of dry, steady sunshine, that evening cloud is the thread to watch.