Current forecasts from the India Meteorological Department and global models indicate minimum temperatures in Lucknow around 26–27°C for September 15 amid active monsoon conditions with scattered thunderstorms and high humidity. Trader sentiment remains split because short-term variability in cloud cover, rainfall timing, and local wind patterns can shift overnight radiative cooling by several degrees, with clearer breaks potentially allowing mins closer to historical September averages of 24–26°C while persistent overcast or rain keeps them elevated near 27–28°C. A dip to 21°C or below would require atypical cold-air advection or exceptional post-monsoon drying not supported by current guidance, whereas 31°C-plus would demand sustained warm, moist air without nocturnal clearing. New IMD model runs and satellite observations over the next 48 hours represent the key data releases that could resolve the narrow spread between these outcomes.