Trader consensus shows tight uncertainty between 20°C and 21°C minima, with those outcomes leading at 37.5% and 39.5% implied probability. Short-range ensemble forecasts exhibit a narrow spread around these thresholds due to variable nocturnal cloud cover, boundary-layer humidity, and light wind regimes that modulate radiational cooling over the Seoul basin. Typical mid-June climatology features average lows near 18–20°C, yet current synoptic patterns favor modest suppression of cooling. Final model runs and official observations from the primary Seoul station will determine resolution, with any shift in predicted dew points or advection likely to tip the balance between the two frontrunners.