Weather maps from WXCharts suggest the hottest day of the upcoming warm spell could be September 9, when temperatures may climb to 28C in south-east England. Even northern parts of England could see highs of 26C, while Scotland is forecast to remain largely dry on this day, with average temperatures of around 20C.
Cooler conditions before the warm spell
This warmer spell is expected to be preceded by cooler conditions, with temperatures averaging around 20C. While not expected to be as hot as July and August, drier periods with temperatures of around 26C are forecast to affect much of the country on some days, especially later in the month.
Met Office outlook for early September
The Met Office long-range weather forecast for the first week of September predicts an "unsettled" period, with some heavy rain and thunderstorms. The forecast adds: "Rainfall amounts will probably be above average for the time year and there is potential for some strong winds at times. Some drier and more settled interludes could develop at times, but these will likely be short-lived."
For Wednesday 9 September to Wednesday 23 September, it states: "Most likely a continuation of the generally unsettled conditions at first with showers or longer spells of rain across many areas, perhaps heavy and thundery in places. However, there may still be some brief drier interludes at times.
"Further into September, drier weather may become more prevalent, especially in the south and southeast, with any more unsettled conditions tending to become more likely further north and northwest. Temperatures will probably be near normal at first but may become warmer later, with the possibility of some hot spells in the south."
Counties forecast to reach 27C or more
The full list of counties with 27C or more forecast on September 9 includes Nottinghamshire, Leicestershire, Lincolnshire, Rutland, Northamptonshire, Huntingdonshire, Bedfordshire, Buckinghamshire, Oxfordshire, Berkshire, Middlesex, Surrey, Greater London, Wiltshire, Somerset, Gloucestershire and Devon.
