Trader consensus heavily favors a 31°C high in Seoul-Incheon on August 13 due to KMA forecasts of mostly clear mornings transitioning to increased afternoon cloud cover with only a 20% precipitation chance, combined with coastal sea-breeze moderation at Incheon stations and post-heatwave cooling after early-August extremes exceeding 42°C elsewhere. This aligns with mid-August subtropical climatology where average highs fall in the 30–32°C range amid high humidity, though Incheon observations often run 1–2°C below inland Seoul sites. Realistic challenges include unexpected clearing that boosts solar heating toward 33°C or revised model runs showing stronger warming. Updated KMA briefings and hourly readings through the afternoon remain key near-term variables.