**Forecast models from the UK Met Office and other sources currently indicate a minimum temperature of 16–17 °C for London on 28 August 2026, with the daily low expected overnight or in the early morning under partly cloudy skies and moderate southwesterly winds.** This aligns with the closely matched market-implied odds favoring 17 °C (37 %) and 16 °C (35.5 %). The primary scientific drivers include persistent cloud cover and humidity from an unsettled Atlantic flow, which limits nocturnal radiative cooling compared to clear-sky conditions, while moderate winds (around 3–7 m/s) promote some atmospheric mixing that prevents deeper temperature drops. A passing frontal system and possible showers contribute additional uncertainty in the exact minimum, as variable precipitation and cloud timing can shift the low by 1 °C. These near-term forecasts sit well above the long-term August average low of roughly 13 °C at London Heathrow, reflecting the current warmer, more humid airmass. Traders appear to weigh the consensus model guidance heavily, with the narrow spread between 16 °C and 17 °C reflecting inherent forecast uncertainty in boundary-layer processes this close to the event. Later updates from official agencies will likely refine the outcome as new model runs incorporate the latest observations.