Mexico City's June climatology centers afternoon highs near 24–26°C amid the onset of the rainy season, when morning insolation often peaks before convective clouds and showers develop by midday or afternoon. Recent observations show daily maxima fluctuating between 25–28°C, with June 11 recording exactly 26°C, supporting the slight market edge for that outcome over 25°C. Key differentiators include variable low-level moisture, timing of thunderstorm initiation, and the strength of the subtropical ridge steering drier air; earlier or more widespread cloud cover caps temperatures at 25°C or below, while clearer conditions allow brief spikes to 27°C before precipitation. Official CONAGUA and global model consensus indicate modest day-to-day variability without strong anomalous signals, leaving the 45–55% range between the two leading outcomes driven by forecast uncertainty in convective timing rather than large-scale shifts.