The Met Office has predicted a warm, humid day for Bristol - with a cloudy afternoon.
Sunny intervals are expected until around 10am, by which point the skies will turn grey, according to the weather experts.
At 7am the temperature will begin a rise from 17 degrees Celsius up to a high of 21 degrees by noon.
The rest of the afternoon will boast a similar temperature, with wind speeds of up to 17mph, before cooling slightly into the evening.
As for the rest of the UK, the Met Office predicts that clouds and outbreaks of rain will spread across northern and western parts during the day, reaching central England by the evening.
The southeast, meanwhile, will enjoy mostly dry and warm weather, with sunny spells.
By Thursday, downpours will be widespread, affecting nearly all of the UK.
And Friday will see heavy showers hitting the whole country.
