Recent forecast guidance from models like those used by the Met Office and AccuWeather indicates overnight lows in London for July 26 likely ranging 14–18°C amid a shift from earlier mid-July heat, with scattered rain, overcast skies, and moderate winds expected to influence nocturnal cooling. Cloud cover and precipitation reduce radiative heat loss from the surface, typically keeping minimum temperatures higher than under clear conditions, while any clearer breaks could allow sharper drops toward or below 15°C. Historical July averages near 17°C provide context, yet short-term model runs remain sensitive to exact timing of frontal passages and moisture levels, sustaining tight market spreads between the sub-15°C and mid-to-upper teens outcomes as traders weigh the latest ensemble guidance ahead of final resolution.