Latest official forecasts from the Met Office and ensemble models point to a high of 15–16°C in London on October 16, driven by a northwest wind shift behind an early rain front that clears southeastward, replacing the prior mild southwesterly flow. Thursday’s peak near 21°C reflects lingering warmth before this transition, with historical mid-October averages around 15.7°C providing context for the expected drop. Market-implied odds favoring 17°C suggest traders anticipate minor upward revisions in afternoon observations or model runs, while uncertainty in exact timing of clearing skies and wind speeds keeps lower outcomes like 15°C in play ahead of final verification.