Recent forecasts from meteorological models indicate Mexico City overnight lows near 14°C on September 26, driven by persistent cloud cover and light precipitation expected from the lingering rainy season, which limits radiative cooling. Trader sentiment remains closely split between outcomes above 16°C and at or below 6°C because ensemble guidance shows sensitivity to exact timing of clearing skies and wind patterns that could allow stronger cooling or maintain milder conditions. Historical September minima average around 10–14°C, with current high humidity and light northerly winds supporting the consensus range of 13–15°C while leaving room for model divergence on the precise minimum. Updated runs from agencies monitoring the region will refine these probabilities ahead of overnight observations.