Cornwall weather: Tuesday 11 August, 31°C heat by Wednesday

If you are picking a day this week to be outside, the numbers make the choice for you. Today is warm, tomorrow is hot, and the run of dry, sunny weather holds until the end of the week. The regional Cornwall weather forecast for South West England has the heat building steadily before anything changes.

Today

Early mist and fog patches lift to leave another mostly sunny day, with only some patchy cloud around. The easterly breeze is brisker than it was on Monday, so parts of the coast will feel fresher than the thermometer suggests. It turns very warm by the afternoon, with a maximum of 27°C.

Tonight

Plenty of evening sunshine, then a dry night with long clear periods and variable cloud. Urban areas hold onto the warmth. The countryside cools further by dawn, down to a minimum of 14°C.

Wednesday

This is the one to plan around. Dry with lots of strong sunshine and temperatures rising quickly through the morning. High level cloud will leave the sky hazy at times. Very warm, locally hot, with a maximum of 31°C.

Thursday to Saturday

Thursday stays hot or very hot with plenty of strong sunshine. From Friday it turns a little fresher and cloudier, and by Saturday there is perhaps the chance of an odd shower. That shower is the only interruption in a forecast that is otherwise dry from start to finish, and it is still only a chance.