Official meteorological observations for September 8, 2026, in Buenos Aires recorded a daily minimum of 8°C, establishing the market consensus. This followed a brief polar air intrusion earlier in the week that produced a 2.4°C low on September 6, after which northerly flow and rising 500 hPa heights moderated conditions. Forecast models from the Servicio Meteorológico Nacional converged on 7–9°C overnight lows under partly cloudy skies and light winds, aligning with the final station reading. September climatology shows typical minima near 10°C, so the observed value reflects residual cool advection rather than an extreme event. Resolution hinges on verified station data, with any post-analysis revision the only realistic path to altering the outcome.