**Forecasts for September 5, 2026, point to a mild overnight minimum in Paris, with most models showing a low around 17–18°C amid clearing skies, light northwest winds, and a stable air mass.** Current conditions feature high pressure and weak gradients, producing daytime highs near 26–27°C and allowing moderate radiational cooling overnight without strong cold advection. Dew points in the 10–14°C range and minimal cloud cover support this range, consistent with early-September climatology where average lows sit near 12–13°C but recent patterns have trended milder. The closely matched market probabilities (notably around 15–17°C) reflect genuine uncertainty in the precise minimum, driven by small differences in model guidance on overnight wind speeds, residual cloud, and urban heat-island effects that can limit cooling. A slightly stronger northwest flow or earlier clearing could push the low toward 15–16°C, while calmer conditions or a marginally warmer boundary layer favor 17°C or higher. No major weather systems are expected to alter the setup before resolution.