Latest Met Office guidance and ensemble model consensus point to a mostly sunny day with light winds across London on August 16, supporting maximum temperatures of 24–27°C as the most probable range. This aligns with the closely matched market-implied odds, where 24°C through 27°C capture roughly 82% of trader positioning. Key differentiating factors include minor variations in forecast cloud cover timing and any weak Atlantic front approaching later, which could cap or boost the afternoon peak by 1–2°C. Historical August averages near 22°C provide context, but current synoptic patterns favor slightly above-normal warmth. Updated model runs and official observations over the next 48 hours will narrow the exact maximum recorded at representative stations.