Current forecast models from agencies like the Met Office and ECMWF indicate overnight lows in London around 13–14°C for June 13, driven by a typical early-summer Atlantic air mass with moderate cloud cover limiting radiative cooling. This places the minimum temperature near the June climatological average of 13°C while accounting for urban heat island effects that can elevate readings by 1–2°C compared to rural sites. The tightly bunched market odds around 12–15°C reflect inherent forecast uncertainty in exact minimum timing and local variations, with traders weighing ensemble spread and potential for clearer skies to push readings lower or warmer advection to raise them. Updated model runs expected over the next 48 hours will likely refine these probabilities ahead of resolution.