Official forecasts from the Met Office and numerical weather models indicate a maximum of 15–18°C across London on October 7, 2026, with persistent cloud cover, showers, and northerly winds keeping readings tightly clustered near 16°C. This consensus, backed by surface observations and ensemble runs showing limited diurnal warming under overcast skies, underpins the market’s 96.5% implied probability for 16°C. Historical October averages near 17°C provide context, yet today’s cooler airmass and precipitation suppress upside risk. A stronger southerly flow or unexpected clearing could push readings to 17–18°C, while heavier rain or stronger northerlies might cap the high below 16°C; updated Met Office briefings and real-time station data will determine final resolution.