Forecast models from the India Meteorological Department and international sources indicate overnight lows near 26–27°C for Lucknow on September 13, driven by persistent monsoon trough influence, elevated humidity, and variable cloud cover that limits radiative cooling. Recent orange alerts for heavy rain underscore active moisture transport, which tends to moderate minimum temperatures by trapping heat and suppressing clear-sky drops. Key variables separating market bins include the precise timing of any showers, wind patterns affecting boundary-layer mixing, and model consensus on cloud fraction—clearer conditions could push readings toward the mid-20s or lower, while sustained overcast or precipitation supports the upper-20s range. New short-range guidance updates expected in the next 24–48 hours will likely refine these thresholds ahead of resolution.