Recent forecasts from the Met Office and AccuWeather indicate London’s minimum temperature on August 25 will likely settle in the 15–18°C range, driven by persistent high pressure maintaining a mild southerly airflow and limiting nocturnal radiative cooling. This setup follows a summer of above-average UK temperatures, with minimums running 1.5°C warmer than the 1991–2020 baseline through mid-August. Model consensus shows limited cloud cover and light winds overnight, supporting gradual cooling to the mid-teens rather than sharper drops, while the absence of incoming Atlantic fronts reduces the chance of colder air advection. Trader probabilities cluster around 16–17°C because these align with ensemble guidance and historical analogs for late-August nights under similar synoptic patterns, with only modest upside risk from any unexpected clear-sky enhancement of cooling. Updated model runs and official briefings over the next 48 hours will refine these implied odds ahead of the daily minimum observation.