Strong El Niño conditions, now forecast to reach very strong or record levels by late 2026 with Niño-3.4 anomalies exceeding +3°C, are the main catalyst elevating 2026’s implied probability of ranking as the warmest year. August 2026 set or tied the global monthly record according to Copernicus, NOAA, and Berkeley Earth data, with year-to-date anomalies tracking near or above 2024 levels amid sustained ocean heat content. This combination of anthropogenic warming and El Niño-driven heat release has pushed Berkeley Earth’s estimate to a 93% chance of a first-place finish, closely aligning with current market-implied odds. The most plausible alternative remains a second-place outcome if late-year cooling emerges. Upcoming monthly releases from NOAA and Copernicus will refine these probabilities ahead of final annual rankings.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedView resolved

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