Recent ERA5 reanalysis and Copernicus data place September 2026 global surface temperatures at approximately 1.63°C above the 1850–1900 pre-industrial baseline, the second-hottest September on record behind 2023, driven by persistent ocean heat content and a strong El Niño event that elevated equatorial Pacific sea surface temperatures. NOAA and Berkeley Earth reports confirm August 2026 as the warmest on record at 1.65–1.71°C, with September following closely amid continued above-average land and ocean anomalies. Market-implied odds heavily favor the 1.35–1.39°C bin, reflecting trader assessment of final official resolution criteria, potential downward revisions in preliminary figures, and historical precedent for monthly anomalies clustering near current long-term warming levels of roughly 1.4°C. Upcoming agency releases from NOAA and NASA will provide key updates to refine these probabilities.