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Global surface temperature anomalies are tracked monthly by multiple scientific agencies including NASA and NOAA, making May 2026 data verifiable by early June. This prediction market focuses on an unusually narrow temperature band: 1.20–1.24°C above pre-industrial baseline. The 7% odds reflect strong trader skepticism that global temperature will fall into such a tight range during May. Current warming trajectory runs approximately 1.3°C above baseline, so this market essentially bets whether May will see a temporary cooling or stagnation. Recent months have shown volatility tied to El Niño cycles and seasonal patterns. The narrow 0.04°C window means traders believe May is more likely to fall either below 1.20°C (cooler than expected) or above 1.24°C (continued warming momentum). Most recent scientific consensus suggests continued warming, which would push temperature above the predicted band rather than within it, supporting the low odds.
What factors could move this market?
Global temperature anomalies measure how far actual conditions deviate from the 1850–1900 pre-industrial average, establishing a consistent baseline across scientific institutions. NASA, NOAA, the UK Met Office, and the Japan Meteorological Agency all publish independent monthly estimates that typically align within 0.05°C. May 2026 falls into a critical observational window: past the immediate influence of the 2023–2024 El Niño event but still within the broader context of multi-year warming trends. The 1.20–1.24°C band this market targets is remarkably precise—only 0.04°C wide—making it statistically one of the narrowest possible outcomes. For global temperature to hit this exact range, May would need to exhibit exceptional stability with no seasonal surge, no anthropogenic acceleration, and no atmospheric anomalies. Factors that could push the market toward YES include a sudden North Atlantic cooling phase, unexpected volcanic aerosol injection, or a temporary weakening of the Indian Ocean Dipole. Conversely, sustained greenhouse gas emissions, continued loss of Arctic sea ice, and normal seasonal warming trends all favor temperatures higher than 1.24°C. Historical data from 2015–2023 shows May temperatures typically trend warmer than April as solar forcing increases, which works against the prediction. The Intergovernmental Panel on Climate Change projects 1.5°C will be breached permanently sometime between 2026 and 2035, and current trajectory suggests May 2026 is more likely to exceed 1.25°C than remain below it. The 7% implied probability reflects trader consensus that specific temperature bands are inherently difficult to hit: markets with tight ranges typically display single-digit odds regardless of the range's location in the climate spectrum. This low likelihood doesn't signal doubt about continued warming, but rather acknowledgment that predicting such narrow monthly outcomes introduces substantial measurement and modeling uncertainty. The resolution mechanism depends entirely on official temperature datasets published by NASA's GISS division and NOAA's Global Monitoring Laboratory around mid-June. Traders bidding at 7% cents are essentially saying: while global warming is real and accelerating, the probability of May 2026 landing in this exact 0.04°C window is very low—perhaps 1 in 14.
What are traders watching for?
Monthly global temperature anomaly published by NASA GISS and NOAA approximately June 8–15, 2026—the primary resolution source.
El Niño Southern Oscillation phase in May 2026. Warm phase favors higher temperatures, pushing above the 1.24°C threshold.
Any significant volcanic eruptions or atmospheric aerosol events in April–May 2026 that could trigger short-term cooling anomalies.
Arctic sea ice extent trends. Accelerating ice loss typically correlates with higher global temperature anomalies.
How does this market resolve?
Market resolves on June 10, 2026, based on NASA GISS and NOAA official monthly global surface temperature anomaly for May 2026. YES wins if the anomaly falls between 1.20°C and 1.24°C above pre-industrial baseline.
Polymarket Trade is an independent third-party interface to the Polymarket CLOB prediction market exchange on Polygon — not affiliated with Polymarket, Inc. Prediction markets aggregate trader expectations into real-time probability estimates. Every market question resolves YES or NO based on a specific event outcome; traders buy shares of the side they believe will resolve positively. Prices range 0¢ (certain no) to 100¢ (certain yes) and naturally reflect the crowd-implied probability of YES. Polymarket Trade is non-custodial — your funds never leave your wallet. Open the full interactive page linked above to place orders, see order book depth, and execute a trade.
