Cornwall weather: Thursday 17 September, gusty then warmer by Sunday

If you are stepping out early, take a coat. Cornwall starts Thursday on the damp and blustery side, with a wet dawn and winds gusting past 30mph, before the cloud breaks up into brighter spells. Stick with it, because the wider picture through the week’s weather is a gradual warm-up, with the wind easing off and temperatures climbing towards the low twenties by the weekend.

Today

Thursday brings sunny intervals for Truro and much of Cornwall, with a high of 18C and a low of 12C. It will feel more like 15C once the breeze is factored in, and that breeze has teeth first thing, with gusts touching 31mph. The rain risk is front-loaded on the morning, peaking around 70% at about 6am, so the wettest part of the day is the start. After that the showers back off and the skies open up in patches.

Tonight

Overnight stays partly cloudy and mild for the time of year, with the temperature dropping only to around 12C and feeling close to 13C. A quiet, unremarkable night after the busier daytime, with the wind falling away from its daytime peak.

Friday 18 September

Friday turns overcast, with grey skies more or less holding all day. The high nudges up to 19C and the low sits at 16C, feeling around 16C. There is a smaller chance of rain, roughly 30% in the early hours, and the wind stays fresh with gusts near 30mph. Not a day for big blue skies, but milder than Thursday and largely dry once you are past dawn.

Saturday 19 September

The weekend opens overcast again, though a touch warmer still, with a high of 20C and a low of 16C. It should feel like 18C, helped by the wind easing a little to gusts around 29mph. Rain chances stay low at about 30%, so if you have plans outdoors the cloud is more of a concern than a soaking.

Sunday 20 September

Sunday is the pick of the week so far. Sunny intervals return, the high reaches 21C and it feels much like it, around 20C, as the wind drops back to gusts of about 21mph. The rain risk holds at roughly 30% overnight into the small hours, leaving the daytime looking the brightest and warmest since Thursday.

Monday and the outlook

Into next week the warmth hangs on. Monday 21 September stays cloudy but holds at 21C, feeling like 21C, with the rain risk falling right down to around 10% and the wind almost gone, gusting a gentle 13mph. So the story of the week is a simple one, a rough and gusty start on Thursday giving way, day by day, to something calmer and warmer. Whether that settled spell holds much beyond Monday is the part still up in the air.