**Current forecasts for Seoul/Incheon on September 24, 2026, point to a lowest temperature near 19–21°C, with daytime highs of 25–29°C under partly cloudy skies and light northwesterly winds.** Multiple models (including GFS-based and agency outlooks) converge on overnight lows in this moderate range, consistent with late-September climatology where average minima hover around 17–18°C. Key drivers include a stable high-pressure ridge maintaining northeasterly flow, which suppresses strong cooling or heating. No major cold fronts or heat domes are expected in the short term, though minor model spread in cloud cover and boundary-layer mixing could shift the exact minimum by 1–2°C. Precipitation chances remain low (<10%), limiting evaporative cooling effects. The even 50/50 market split between 15°C or below and 25°C or higher reflects trader emphasis on tail risks—such as an unexpected surge in northerly flow or clearer skies allowing greater radiational cooling—despite the consensus central tendency around 20°C. Upcoming high-resolution model runs and official Korea Meteorological Administration updates over the next 48 hours will likely narrow this uncertainty ahead of resolution.