**Trader sentiment for London's lowest temperature on August 6, 2026, centers on 14–15°C as the most probable outcomes, reflecting a blend of climatological norms, recent warm conditions, and stable forecast guidance.** August overnight lows in London typically average around 13–14°C, with the market-implied probabilities clustering near this baseline amid a broader pattern of above-average warmth. Persistent high-pressure systems have maintained settled, mild conditions through early August, with recent observations showing overnight minima near 17–18°C on August 4–5 and daytime highs reaching 29°C. Long-range outlooks from sources such as the Met Office and seasonal models indicate continued warmer-than-average temperatures (1–2°C above the 1991–2020 baseline), driven by a northward-shifted jet stream and elevated sea-surface temperatures that limit radiative cooling at night. Light showers or variable cloud possible around August 6 introduce modest uncertainty in exact minimums, but model consensus points to limited cooling. Resolution will hinge on official Met Office or equivalent station readings for the calendar-day minimum, with any late-model shifts in Atlantic flow or clearer skies the main variables that could nudge probabilities toward the lower tail (13°C or below) or sustain the 15°C lead.