Current ensemble forecasts for Shanghai indicate a nighttime minimum temperature on June 19 most likely in the 23–25°C range, aligning with the closely bunched market-implied odds favoring 24°C and 25°C. Typical early-summer conditions—high humidity, moderate winds, and possible cloud cover or showers—limit radiative cooling overnight, while the urban heat island effect sustains warmer lows compared to rural surroundings. Model consensus from agencies like the China Meteorological Administration shows limited spread around these values, though small shifts in timing of any frontal passage or precipitation could push the recorded minimum toward 23°C or hold it near 25°C. Historical June climatology places average lows near 20–22°C, but recent patterns and the day's specific setup support the tighter clustering traders have priced. Updated model runs and official observations tomorrow morning will refine resolution criteria.