Recent data positioning 2026 for a top-two finish among the hottest years on record has fueled trader consensus around a first-place outcome. Year-to-date global temperatures through September rank second only to 2024, with the month itself clocking in as the planet’s second-warmest September behind 2023, while U.S. land and ocean surfaces set multiple new highs amid intensifying El Niño conditions. Accelerating greenhouse-gas concentrations, record ocean heat content, and persistent regional heat waves have sustained momentum, mirroring the surge seen in 2023–2025. With the strong El Niño event expected to deliver additional warmth through year-end, analysts highlight a realistic path for 2026 to edge out prior leaders, though a late-year cooldown or measurement variance could lock it into second. The market’s heavy weighting toward first or second reflects these verified trends and the limited window left for a dramatic shift.