**Current meteorological conditions and forecast models from sources like the GFS strongly support a daily maximum of 30°C in Busan on September 13, 2026.** Clear to mostly clear skies, light southerly or variable winds, and high pressure have allowed daytime heating to build steadily, with afternoon readings approaching or reaching this threshold under typical late-summer insolation levels for the region. This aligns with observed trends: recent days have featured highs in the upper 20s°C amid stable, dry air masses with minimal cloud cover or precipitation. Official monitoring (such as from the Korea Meteorological Administration) and model consensus show no significant cooling influences like frontal passages or increased marine layer effects that would cap temperatures lower. The market-implied odds reflect traders' assessment of these data, where real-capital stakes aggregate the high likelihood of exactly 30°C as the recorded peak. Realistic challenges remain limited but include last-minute increases in cloud cover, stronger onshore winds, or minor model revisions in the final hours that could trim the high by 1–2°C. Historical mid-September baselines for Busan hover near 26–28°C, so the current setup represents a modestly warmer anomaly driven by the persistent clear conditions. Final resolution depends on the official station reading, with any post-forecast adjustments potentially shifting outcomes if observations diverge from guidance.