Met Office London weather as UK set for hottest day of year 

This tops the hottest recorded temperature this year in London in July, which reached a high of 32 degrees.

These hotter conditions come following tropical Storm Debby, which has strengthened the jet stream, bringing hot air to the UK over the late weekend into Monday.

Met Office Deputy Chief Meteorologist, Dan Holley, said: “We expect to see a relatively brief hotter and more humid spell of weather for Sunday and Monday, before these hotter conditions recede on Tuesday, allowing more unsettled conditions to return.

“This change to hotter conditions is caused, in part, by the effects of Tropical Storm Debby in North America. Debby is helping to strengthen the jet stream, causing it to meander over the Atlantic. This will allow hot air over France to move into the UK later this weekend, and early next week.”

Temperatures will begin to increase during the morning, already starting from an overnight high of 20 degrees, and climbing into the 30s by 12pm.

Monday is expected to remain clear and sunny for the entire day and leading on into Tuesday, before temperatures begin to cool again mid-week.

Some places could hear the odd rumble of thunder, with thunderstorms expected by the late afternoon, bringing generally warm and humid conditions overnight.

Here’s an hour-by-hour forecast for Monday:

• 12am - Clear
• 1am - Clear
• 2am - Clear
• 3am - Clear
• 4am - Clear
• 5am - Clear
• 6am - Sunny
• 7am - Sunny
• 8am - Sunny
• 9am - Sunny
• 10am - Sunny
• 11am - Sunny
• 12pm - Sunny
• 1pm - Sunny
• 2pm - Sunny
• 3pm - Sunny
• 4pm - Sunny
• 5pm - Sunny
• 6pm - Sunny
• 7pm - Sunny
• 8pm - Clear
• 9pm - Clear
• 10pm - Clear
• 11pm - Clear

Today’s Met Office forecast in full:

Hot and humid, and locally very hot, especially inland. Sunny spells expected, but some cloud building through the day, bring a chance of thunderstorms by late afternoon and overnight. Maximum temperature 34 °C.