**Recent heatwave conditions across South Korea, driven by a strong subtropical high-pressure system, set the stage for elevated temperatures, but increasing cloud cover and scattered showers are expected to moderate the peak on August 15.** Official Korea Meteorological Administration guidance and short-range models point to a mostly cloudy day with a 30% chance of precipitation, limiting intense solar heating compared to the clearer, record-setting days earlier in the month when Seoul approached or exceeded 37–39°C. This favors a daily maximum near 30–32°C at Incheon International Airport, the reference station for the market. Key differentiating factors include the timing and coverage of afternoon convection (which can shave 1–2°C off the high), boundary-layer moisture from the East Asian monsoon circulation, and any subtle shifts in steering flow that alter onshore versus offshore winds. Historical August climatology shows typical highs around 30°C, with variability of ±2–3°C tied to these same synoptic elements. Updated model runs closer to the date will refine whether marginal clearing allows a 31°C reading or persistent clouds keep it at 29°C.