Current forecasts from multiple models indicate Cape Town's overnight minimum on September 13 will likely fall in the 14–16°C range, driven by moderate southerly to southwesterly winds off the Atlantic and variable cloud cover that limits radiative cooling overnight. Scattered showers and thunderstorms expected later in the period could further moderate temperatures by increasing humidity and reducing clear-sky heat loss. Trader odds remain tightly clustered because ensemble guidance shows small but meaningful spreads in timing and intensity of cloud breaks or wind shifts, with official South African Weather Service observations at Cape Town International Airport serving as the resolution source. New model runs and real-time surface data will refine the exact minimum before market close.