Current forecast models from meteorological agencies show Mexico City highs clustering tightly around 23–25°C for June 12, producing closely matched market-implied odds as ensembles diverge on afternoon convective activity and cloud cover timing during the onset of the rainy season. At the city’s 2,240-meter elevation, daytime maxima are moderated compared with lower-altitude sites, while urban heat-island effects and variable wind patterns can add or subtract 1–2°C depending on insolation and precipitation onset. Historical June averages near 24–25°C provide the baseline, yet short-term model runs remain sensitive to subtle shifts in moisture and high-pressure positioning that determine whether the peak reaches the upper or lower end of the favored range.