Forecast models indicate typical mid-June conditions for London on June 13, with ensemble guidance from sources like the Met Office and ECMWF supporting maximum temperatures clustered around 22–23°C and thus driving the near-even implied probabilities of 30% and 29% for those outcomes. Following an unusually warm May heatwave that produced record highs above 30°C, a cooling trend has established Atlantic-influenced flow and increased cloud cover, moderating peaks toward the long-term average high of 20–22°C. Minor variations in afternoon sunshine, wind speed, or the precise arrival of any weak fronts could shift the daily maximum by 1–2°C, explaining the spread across adjacent bins and the low probabilities assigned to extremes above 25°C or below 20°C. Updated model runs and official Met Office briefings over the next 48 hours will likely refine these short-range uncertainties.