Strong El Niño conditions in the equatorial Pacific, with Niño 3.4 anomalies reaching record levels above +2.8°C by mid-September 2026, represent the dominant near-term driver pushing trader consensus toward the 1.35–1.44°C range for the monthly global mean temperature anomaly relative to 1850–1900. Official monitoring from NOAA and ECMWF shows this very strong event intensifying rapidly after a weak La Niña earlier in the year, sustaining elevated ocean heat content that supports above-average surface temperatures despite the typical seasonal decline in September. Provisional analyses indicate the month is tracking near +0.81°C above the 1991–2020 baseline—consistent with roughly 1.35–1.45°C pre-industrial—while model spreads and the lagged global response to peak El Niño warmth introduce uncertainty around exact placement within the leading bins. Upcoming final ERA5 and Berkeley Earth releases will refine these implied probabilities before resolution.