The UK is bracing for a significant drop in temperatures as Arctic air moves in, with the Met Office warning residents to prepare for chilly nights starting September 13. Following a weekend of severe thunderstorms, the arrival of this cold front will bring daytime temperatures 4-6C below average, peaking at 12-16C across the country. Coventry and Warwickshire are expected to feel the effects particularly, with nighttime temperatures potentially dipping into single figures and frost possible in rural areas. Heavy rain will precede the cold air, with blustery showers forecasted midweek, especially in northern regions. However, conditions are projected to improve by the weekend, returning temperatures closer to seasonal norms. The public is advised to stay updated on weather forecasts as warnings may change throughout the week.