Official India Meteorological Department guidance and global model consensus point to a minimum temperature near 27–28°C in Lucknow on August 21 under active southwest monsoon conditions featuring persistent cloud cover, scattered showers, and high humidity. These factors suppress nocturnal radiative cooling and keep overnight lows elevated relative to clearer-sky baselines, consistent with recent observations of 25–28°C minima. Traders assign the highest implied probabilities to the 26–28°C range because these align closely with current forecast guidance and typical August climatology, while the 22°C-or-below bucket reflects residual uncertainty from possible localized heavy rain or model shifts. Updated IMD briefings and evening model runs will likely refine resolution odds ahead of final measurement.