Official forecasts from the Korea Meteorological Administration indicate a daytime maximum near 32–33°C for the Seoul-Incheon area on August 20, supported by medium-range guidance showing continued warm, humid conditions under mostly cloudy skies with limited afternoon clearing. Model consensus on steering flow and moisture levels leaves room for variation: greater cloud cover or morning showers could cap heating near 27–29°C by reducing insolation, while stronger diurnal warming under partial breaks supports 30–32°C. Historical August baselines near 30°C provide context, yet short-term shifts in precipitation probability and boundary-layer mixing remain the key variables that could resolve the evenly distributed market-implied odds across this range ahead of final observations.