August 2026 global mean surface air temperature reached 1.65°C above the 1850–1900 pre-industrial baseline according to Copernicus ERA5 data, the first such month since November 2025 and well above the >1.29°C threshold. This record anomaly, tying July 2023 as the warmest month observed, stemmed from sustained anthropogenic greenhouse gas forcing combined with rapidly intensifying El Niño conditions that drove extra-polar ocean sea surface temperatures to their highest levels on record. Trader consensus at 100% on the dominant outcome reflects this verified observational margin. While minor dataset revisions or differing reference periods could theoretically narrow the gap, the multi-agency evidence and historical analogs make substantial downward adjustments improbable.