Recent short-term forecasts from agencies like the South African Weather Service and global models indicate Cape Town's overnight minimum on September 9 will likely fall between 14–16 °C under clear to partly cloudy skies and light southerly flow. This range stems from typical early-spring radiative cooling over the interior plateau, moderated by the cold Benguela Current's marine influence that limits deeper drops. Trader odds cluster tightly around 14–15 °C and the 10 °C-or-below versus 20 °C-or-higher brackets because ensemble members differ on exact wind speeds and cloud cover timing, which control how much heat escapes overnight. Historical September minima average near 10–12 °C, so any model shift toward stronger onshore flow or increased humidity could push the low higher and quickly reprice the market. Updated runs from the European Centre for Medium-Range Weather Forecasts and local high-resolution guidance expected within 24 hours will likely resolve much of the current 45–55 % uncertainty band.