Official meteorological observations from Warsaw surface stations have recorded a daily maximum temperature of exactly 21°C on September 7, 2026, under predominantly cloudy skies and moderate southwesterly flow that limited afternoon heating. This outcome aligns with the consensus from regional forecast models, which projected a modest diurnal range given high pressure and near-100% cloud cover through peak insolation hours. Trader consensus at 100% reflects the finality of verified station data, which resolves the market once the meteorological day concludes. Only a post-hoc data revision or station malfunction could alter the result, though such corrections remain rare for standard Polish Institute of Meteorology records.