Parts of the UK could see temperatures rise close to 29C in late September as forecast models indicate a potential period of warmer weather across southern regions.
Weather maps analysed by forecasters show a warmer spell developing from around Thursday, September 24, with several areas expected to experience temperatures above the seasonal average for short periods.
Forecast Maps Point To Warmer Conditions Across Southern Britain
According to The Mirror, weather maps from WXCharts show a band of warmer conditions moving across parts of the UK during the final week of September. The forecast suggests temperatures could reach 27C in areas including the South West, South East, West Midlands, East Midlands, London, Anglia, and Yorkshire and Humber.
The warmest conditions are expected across southern England. Some locations, including parts of Somerset, could approach 29C, while areas such as Berkshire and Wiltshire are forecast to reach around 28C.
The possible rise in temperatures follows a period of changeable autumn weather, with forecast models showing a temporary shift toward warmer conditions.
Credit: WXCharts
Met Office Forecast Highlights Possible Settled Periods
The Met Office long-range forecast for Saturday, September 19 to Monday, September 28 indicates that some parts of the country may experience calmer weather during the period.
The forecast says: “There will also be some reasonably dry and more settled periods in between these systems, especially across southern areas.
“There is a chance settled weather may expand further northwards during the final week of September.
“Temperatures for the period as a whole will probably be close to average overall, but there is scope for some rather warm days at times, as well as relatively cool nights which may bring the occasional grass frost.”
The forecast suggests that warmer afternoons could occur alongside cooler overnight temperatures, a pattern often seen during the transition from summer into autumn.
Several Regions Could See High Temperatures
The predicted warm spell would not be limited to one area. Forecast maps indicate that temperatures could climb across multiple regions as September draws to a close.
On Friday, temperatures are expected to rise further, with parts of the West Midlands, East Midlands, South East, London, and Anglia potentially reaching 27C.
During the weekend, some southern locations including South London, Surrey, and Cambridgeshire could approach 29C, while parts of Yorkshire may see temperatures around 28C.
Further north, conditions are expected to remain milder rather than matching the highest temperatures forecast for southern England. Areas such as Greater Manchester are projected to reach around 24C.
Heatwave Definition Remains Based On Local Thresholds
The Met Office defines a heatwave as an extended period of hot weather where daily maximum temperatures meet or exceed a specific local threshold for at least three consecutive days.
These thresholds vary across the UK, with the benchmark generally between 26C and 28C in southern areas.
The late September forecast does not indicate that all parts of the country will experience heatwave conditions, but some locations may see unusually warm days during the final stages of the month.
The current forecast maps show the highest temperatures developing around Thursday, September 24, with parts of southern England potentially reaching 29C.
