**Forecast models for Cape Town on August 31, 2026, point to a daily minimum near 9–11°C under mostly clear skies and light southerly winds, driving the tight clustering of market probabilities around 8–10°C.** Clear conditions after recent frontal passages promote strong nighttime radiative cooling, with dew points near 6–8°C limiting how far temperatures can fall before saturation. High pressure and stable airflow from the south suppress cold advection, keeping the air mass mild compared with earlier August variability that included sharper drops. Traders appear to balance ensemble spreads showing slight differences in overnight cooling rates—calmer winds and drier air could push the low toward 8°C, while modest cloud or wind remnants might hold it near 10°C. Historical winter baselines for late August minima (typically 8–12°C) provide context, but the current setup lacks strong cold-air intrusions, leaving the precise threshold sensitive to small forecast adjustments in the final model runs.