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Hottest Year on Record 2026 Odds & Leverage Trading

Current Picture: 2026 Poised for Second-Hottest Year

The prediction market asking "Where will 2026 rank among the hottest years on record?" currently prices second-hottest at 63.5%, with hottest-ever at 30% and third place or lower at under 7% combined. As of July 2026, these hottest year 2026 odds reflect a market that has absorbed six months of temperature data, a declared El Nino event, and the most recent climate model projections. For traders who want to express a view on whether this year breaks records or settles into second place, PredMart offers up to 5x leverage on this market.

The market resolves based on NASA's Global Land-Ocean Temperature Index, specifically the "No_Smoothing" column for 2026 in their official dataset. Years are ranked in descending order - the hottest year is number 1, second-hottest is number 2, and so on. With over $3 million in total volume and $102,000 in liquidity, this market has attracted significant interest from traders betting on climate outcomes.

Odds Breakdown: What the Prices Mean

The market breaks down into six distinct outcomes with clear probability implications:

The market is essentially a two-horse race between first and second place. Third place or lower combines to under 7%, meaning traders overwhelmingly expect 2026 to finish as either the hottest or second-hottest year in the 146-year instrumental record.

The current pricing implies a 93.5% combined probability that 2026 finishes in the top two. This aligns with virtually every major climate forecast, which projects 2026 to be among the four hottest years at minimum.

Why Second Place Is the Heavy Favorite

Several converging data points explain why the market prices second place at more than double the probability of a new record:

2024 Set an Extremely High Bar

NASA confirmed 2024 as the warmest year on record, with temperatures 1.28 degrees Celsius above the 1951-1980 baseline. The year included an unprecedented 15-consecutive-month streak of monthly temperature records from June 2023 through August 2024. This was fueled by a strong El Nino that peaked in late 2023 and early 2024.

La Nina Cooled Early 2026

The tropical Pacific spent the first months of 2026 in La Nina conditions, which suppresses global average temperatures. According to climate scientist Zeke Hausfather's forecast, global temperatures in 2026 will be "slightly suppressed by modest La Nina conditions in the tropical Pacific early in the year." The January-June 2026 global surface temperature departure was the third-highest in the 177-year record - impressive, but trailing both 2024 and 2025.

Model Consensus Points to Second Place

Carbon Brief's July 2026 analysis projects 2026 as the second-warmest year globally, with a best estimate of 1.47 degrees Celsius above pre-industrial levels. Their 95% confidence range of 1.37-1.58 degrees Celsius means second place is the most likely outcome, though a record remains possible at the upper bound.

Canada's climate modeling service forecasts a global mean surface temperature in 2026 of 1.44 plus or minus 0.09 degrees Celsius above pre-industrial levels - consistent with second place behind 2024's 1.55 degrees Celsius anomaly.

The Case for a New Record: Where Bulls See Value

Despite second place being the favorite, the 30% odds for hottest-ever may underweight several developing factors:

El Nino Declared and Strengthening Rapidly

NOAA officially declared El Nino in early June 2026, and forecasts suggest this event is heading toward extraordinary intensity. According to the International Research Institute, 13 out of 24 models indicate a very strong El Nino event during September-October-November 2026, with sea surface temperature anomalies expected to exceed 2 degrees Celsius in key monitoring regions.

CNN reported in early July that this "Super El Nino" could be even more intense than initially anticipated, with 11 out of 13 models reaching "Super El Nino" status and 8 of 13 predicting an event exceeding the historically observed maximum from 1982-1983. The Washington Post's tracking shows temperatures potentially reaching 3.9 degrees Celsius above average in December - about a degree higher than the record-breaking 2015 El Nino.

James Hansen's Bold Prediction

James Hansen, the climatologist who first warned Congress about global warming in 1988, has been more aggressive than consensus forecasts. His June 2026 analysis from Columbia University states that "2026 is on track to be the hottest year" in the instrumental record. Hansen argues that the late-developing but intense El Nino will push the second half of 2026 into record territory.

Late-Year Surge Potential

El Nino's impact on global temperatures typically lags the oceanic event by several months. While the first half of 2026 was suppressed by La Nina, the second half could see accelerating warmth as the Super El Nino intensifies. A strong enough November-December could pull the annual average above 2024's mark.

If a trader believes Hansen's analysis over the consensus models, buying "hottest-ever" at 30 cents offers 3.3-to-1 odds. With 3x leverage through PredMart, a correct call would return approximately 10x the margin deployed.

Why Third Place or Lower Is Nearly Ruled Out

The combined 6.5% probability for third place or worse reflects the near-certainty that 2026 will not cool significantly below recent years:

The Baseline Has Shifted

2025, 2024, and 2023 were the three warmest years in NASA's 146-year record. For 2026 to rank third or lower, it would need to come in cooler than 2025 (which had a 1.19 degrees Celsius anomaly above the 1951-1980 baseline). Given that the first half of 2026 already tracked as the third-warmest January-June period on record, and El Nino is now strengthening, a dramatic cooling is implausible.

Structural Warming Continues

Background greenhouse gas forcing continues to push global temperatures higher independent of El Nino/La Nina cycles. Even in a La Nina-suppressed year, temperatures now routinely exceed what would have been records a decade ago. The UN's World Meteorological Organization stated in May 2026 that global temperatures are "set to stay near record levels" regardless of shorter-term oscillations.

Hausfather's forecast gives greater than 99% probability that 2026 will be hotter than every year on record prior to 2023. The question is not whether 2026 will be hot - it is whether it will be hot enough to beat 2024.

Monthly Data to Watch

The resolution will be determined by NASA's final annual figure, but several monthly releases will move the market significantly:

August 2026 Data (Released September)

This will capture the first full month of strong El Nino influence. If August comes in at or near record levels for the month, the case for a new annual record strengthens considerably.

Fall Peak Period (September-November)

Climate models project El Nino intensity peaking during September-October-November. This period will be critical - if temperatures surge during these months, the annual average could close the gap with 2024.

December Data

The Washington Post's El Nino tracker projects December temperatures reaching 3.9 degrees Celsius above average. A particularly hot December could push the final annual average over the threshold.

Traders should watch for NASA GISS monthly updates, NOAA global climate reports, and El Nino intensity measurements from the Pacific. Each data release will shift probabilities between the two leading outcomes.

The Science Behind the Rankings

NASA's GISTEMP v4 dataset calculates global surface temperature anomalies by combining land surface air temperatures and sea surface water temperatures. The ranking system compares each year's annual average to the 1951-1980 baseline period.

The current top five warmest years are:

  1. 2024: +1.28 degrees Celsius
  2. 2025: +1.19 degrees Celsius
  3. 2023: +1.17 degrees Celsius
  4. 2016: +0.99 degrees Celsius
  5. 2020: +0.98 degrees Celsius

For 2026 to claim the top spot, it needs to exceed +1.28 degrees Celsius. To secure second place, it needs to exceed +1.19 degrees Celsius but stay below +1.28 degrees Celsius. Current projections from multiple sources center around +1.41 to +1.47 degrees Celsius - comfortably in first or second territory.

The gap between first and second place is approximately 0.09 degrees Celsius. This margin is significant but not insurmountable, especially if the second half of 2026 delivers exceptional warmth.

El Nino: The X-Factor

The developing El Nino is the primary variable that could shift the outcome from second place to first:

Current State

Sea surface temperatures in the Nino 3.4 region have risen sharply since the La Nina that dominated early 2026. Multiple models now show strong to very strong El Nino conditions developing through the second half of the year.

Historical Precedent

The 2015-2016 El Nino was one of the strongest on record and helped push 2016 to what was then the hottest year ever (later surpassed by 2023 and 2024). The current event is tracking to potentially exceed 2015-2016 intensity, which could have outsized effects on late-2026 temperatures.

Timing Matters

El Nino's warming effect on global average temperatures typically lags the oceanic peak by about three months. An El Nino that peaks in late November would most strongly influence December 2026 and January 2027 temperatures. This timing could either push 2026 over the threshold or primarily benefit 2027's annual average.

Hansen projects 2027 could reach +1.7 degrees Celsius above pre-industrial - a potential record-shattering figure. Some of the El Nino-driven warmth traders might expect in 2026 could instead manifest in 2027.

What Resolution Requires

For the market to resolve, NASA must publish the 2026 figure in their Global Land-Ocean Temperature Index dataset. The specific resolution source is the "No_Smoothing" column for the 2026 row at https://data.giss.nasa.gov/gistemp/graphs/graph_data/Global_Mean_Estimates_based_on_Land_and_Ocean_Data/graph.txt.

Key resolution considerations:

NASA typically releases annual temperature figures in mid-January of the following year. Traders should expect resolution in January 2027, shortly after NASA publishes its 2026 analysis.

FAQ

What are the current odds of 2026 being the hottest year on record?

As of July 2026, prediction market odds price 2026 as the hottest year ever at 30% probability, while second-hottest is priced at 63.5%. The combined probability of top-two finish exceeds 93%. These odds reflect current temperature data showing January-June 2026 as the third-warmest such period on record, plus developing El Nino conditions that could drive the second half of the year toward or above record levels. Most climate models project 2026 will likely land in second place, though several scientists including James Hansen argue it could still claim the top spot.

How does El Nino affect the hottest year 2026 odds?

El Nino was officially declared by NOAA in June 2026 and is forecast to strengthen to potentially record-breaking intensity by late fall. El Nino events typically raise global average temperatures by warming sea surface temperatures in the tropical Pacific. However, there is a lag effect - the warming impact on global averages typically follows the oceanic peak by several months. This timing means the strongest El Nino effects may benefit late 2026 temperatures (helping the annual record case) or primarily influence early 2027. Current forecasts show 8 of 13 models predicting an El Nino exceeding historical maximum intensity.

What temperature does 2026 need to reach to set a new record?

For 2026 to become the hottest year on record, it must exceed 2024's annual average of +1.28 degrees Celsius above the 1951-1980 baseline (approximately +1.55 degrees Celsius above pre-industrial levels). Current forecasts from Carbon Brief and other sources project 2026 at around +1.41 to +1.47 degrees Celsius above pre-industrial - likely enough for second place but potentially short of the record. The gap is approximately 0.09 degrees Celsius, which an exceptionally warm second half could close.

When will the 2026 hottest year market resolve?

The market will resolve once NASA publishes the 2026 figure in their Global Land-Ocean Temperature Index dataset, typically in mid-January 2027. The resolution is based on the initial publication - subsequent revisions do not change the outcome. If NASA data is unavailable by March 1, 2027, the market resolves based on consensus credible reporting. The specific resolution source is the "No_Smoothing" column in NASA's GISTEMP dataset.

Why is third place or lower priced so low?

The combined probability of 2026 ranking third or worse is under 7% because temperature data already shows 2026 tracking as one of the warmest years on record. January-June 2026 was the third-warmest such period in the 177-year record, and a strengthening El Nino makes second-half cooling extremely unlikely. For 2026 to rank third, it would need to come in cooler than 2025's +1.19 degrees Celsius anomaly - a scenario essentially ruled out by current data and the developing El Nino. Climate scientists give greater than 99% probability that 2026 will be hotter than every year prior to 2023.

Related

Trade with up to 5x leverage: predmart.com/event/where-will-2026-rank-among-the-hottest-years-on-record

Vsevolod is the founder of PredMart and writes about leverage trading on prediction markets.