**Forecast models and observational trends indicate a typical late-August pattern for Busan, with daytime highs most likely peaking in the 30–32°C range under partly cloudy skies and southwest flow.** Multiple sources, including Meteoprog, Met Office, and WeatherBug, project maxima near 31°C (roughly 85–88°F) for August 30, consistent with the month-to-date average of about 29.8°C and seasonal norms for the region. High humidity (dew points near 26–27°C), 50% thunderstorm chances, and moderate southwest winds of 5–12 mph are expected to limit full solar heating while sea breezes from the Korea Strait provide some coastal moderation. The tight market split between 31°C (37.5%) and 32°C (35.5%) stems from small but meaningful uncertainties in numerical weather prediction outputs. Key differentiators include exact timing and coverage of afternoon convection, which can shave 1–2°C off peaks by increasing cloud cover and evaporative cooling; subtle variations in boundary-layer mixing from wind speed; and minor model spread between ensembles (e.g., GFS versus ECMWF runs) on peak insolation before any showers develop. Historical analogs for the date show a typical range of 27–31°C, with rare excursions above 33°C only under clear, subsident conditions. Traders appear to be weighting the consensus around the upper end of the most probable outcomes while pricing in the realistic chance of a brief clearing that could push the daily maximum slightly higher. No major synoptic shifts, such as an approaching typhoon, are indicated in the latest guidance, keeping probabilities anchored near these two leading bins ahead of final observations.