**Trader sentiment for the August 13 high temperature in Seoul/Incheon centers on the 31–33°C range, with 32°C holding the largest share at 41% implied probability.** Official forecasts from the Korea Meteorological Administration (KMA) project a daytime maximum of 33°C under mostly sunny morning conditions turning partly cloudy, with minimal precipitation risk (20% in the afternoon). International models align closely, showing highs near 33°C (92°F) with moderate humidity and light winds. Recent developments include an ongoing regional heatwave that produced record national highs elsewhere in South Korea earlier in August, though Seoul-area readings have moderated slightly. Historical August climatology for Incheon places typical daily maxima around 30–32°C, providing context for why markets assign low probability to extremes above 34°C or below 30°C. Key variables influencing the final reading include cloud cover evolution, any late-day sea breeze from the Yellow Sea, and verification at the official Incheon station. Updated KMA short-range guidance and real-time observations on the 13th will determine resolution within the narrow forecast window.