Where will 2026 rank among the hottest years on record?

The main reason to be skeptical of a Yes outcome is that 2026 would need to clear an unusually high bar. Recent years have already produced record or near-record global warmth, and the ranking system here only cares about whether 2026 ends up above every prior year in NASA’s annual land-ocean index. From a climate-trend perspective, the long-run warming background keeps raising the floor, but to finish first in the global annual ranking, 2026 would likely need an unusually strong ocean-atmosphere setup that amplifies heat across the year rather than just a warm baseline. As of early September 2026, there is still substantial time left, but nothing in the broad setup guarantees the sort of extreme annual anomaly needed to beat the very warm recent benchmark years.

The strongest argument for Yes is that the climate system has enough momentum that a new record is always possible, even without an obvious dramatic driver at the start of the year. Persistent greenhouse forcing makes every marginally warm year more dangerous for historical rankings, and a sequence of warm months can accumulate into an annual record if the second half of the year remains hot. If 2026 develops into a strong El Niño later in the year, or if oceans continue feeding exceptional warmth into the global average, the annual index could still edge past prior leaders. That said, the gap between merely being one of the hottest years and actually being number one is meaningful, and the market appears to be assigning a probability that assumes another major warming surge rather than a continuation of average-to-very-warm conditions.

The market price implies a fairly high chance of a new record, but I think that overstates the likelihood. For 2026 to win the top rank, it must outperform a recent set of years that have already benefited from a strongly elevated baseline and, in some cases, powerful transient warming influences. If the year finishes in a neutral or weakly warm ENSO state, or if the mid- and late-year temperatures moderate even modestly, 2026 could easily land among the hottest years without being the hottest. My assessment is that Yes remains plausible because climate change keeps compressing the distribution of outcomes, but the most probable outcome is that 2026 ends up very warm and still falls short of the all-time annual maximum.