May 2026 shows 1% market-implied probability of ranking 4th hottest or lower, with $3K 24h volume, resolves June 10. Trade live on Polymarket via Polymarket Trade.
This market has been archived. Historical content preserved below.
May 2026 global temperatures are tracking toward record-breaking levels as climate patterns persist worldwide. The prediction market prices this scenario with just a 1% probability that May 2026 ranks 4th or lower among the hottest May months in recorded history, implying 99% trader conviction that this May will land in the top three all-time hottest Mays on record. Global average temperatures have climbed steadily over recent decades, with 2023 and 2024 already breaking multiple monthly records across regions. The baseline for comparison includes temperature measurements dating back over a century, compiled by organizations like NASA GISS and NOAA using satellite imagery and surface station observations. Resolution depends on official monthly global temperature anomaly data released by meteorological authorities in early June, which measures departure from historical 20th-century baselines. The current market price reflects prevailing warming trends and the exceptional heat patterns already observed during 2024-2025 across continents. The 1% YES odds signal that traders view a scenario falling outside the top three rankings as nearly implausible given current trajectory.
May is a transitional month in the Northern Hemisphere, marking the shift toward summer with variable weather patterns across continents. The historical May temperature rankings reveal a clear upward trend, particularly since the 1990s. The top May months on record have consistently occurred in recent years—2024, 2023, 2016, 2015, and 2010 all rank among the warmest Mays ever measured. This recent clustering at the top of the rankings reflects the long-term warming trend driven by greenhouse gas emissions and ocean temperature dynamics. For May 2026 to rank lower than 4th would require global temperatures to cool relative to the established trajectory, a scenario traders deem extremely unlikely. Several factors influence May global temperatures. Ocean heat content accumulated during winter months carries forward into spring, particularly in regions like the Pacific and Atlantic. El Niño or La Niña conditions in the tropical Pacific affect atmospheric circulation and regional temperatures. Arctic ice melt and reduced ice albedo effect contribute additional warming feedback. Early spring weather patterns established by March and April create momentum that typically persists into May. Tropical storms, volcanic activity, and solar output variations can cause short-term deviations, but these rarely outweigh the baseline warming signal at the global scale. The 1% probability reflects trader conviction that none of these potential cooling factors will override the dominant warming signal. For May 2026 to fall outside the top three, it would need to experience either exceptional temporary cooling (unprecedented in recent climate data) or a major reversal in ocean heat content. Traders are essentially pricing the question: given the current climate state and May's position in the annual cycle, what is the realistic probability of this month being cooler than the past years' top rankings? The answer, implied by market prices, is nearly none. Relevant context includes the 2015-2016 El Niño event, which drove global temperatures to anomalous peaks that stood as records for years. The recovery after that event and subsequent warmer-than-average years have reset expectations. 2024 was the warmest year on record; 2025 is tracking similarly warm. By May 2026, the climate system may have slightly cooled if current patterns shift, but traders assign minimal probability to cooling enough to fall outside the top three May months. The market spread—$9K liquidity at 1% YES price—shows relatively low trader interest in the YES side, consistent with the fringe probability. The high confidence in a top-three finish reflects both historical trend analysis and the near-term climate dynamics expected through May 2026.
Market resolves on NOAA's official May 2026 global temperature anomaly data released in early June. YES wins if May 2026 ranks 4th or lower among historical May months.
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.