Trade: 2026 May 1st, 2nd, 3rd hottest on record?

Market context

The market concerns whether May 2026 will rank among the three warmest May months in the instrumental temperature record when measured by NASA's Global Land-Ocean Temperature Index. Settlement depends on official data released after the month concludes, comparing the May 2026 anomaly against all prior May readings since records began in 1880. The current order book on Polymarket reflects a 61% implied probability for YES, suggesting traders assess a moderately elevated but not overwhelming likelihood of this outcome.

Recent years have seen May temperatures consistently rank in the upper percentiles of the historical distribution. May 2023 and May 2024 both registered among the warmest on record, with 2024 setting a new May maximum. This clustering of extreme readings in consecutive years reflects the ongoing warming trend and elevated baseline temperatures from which anomalies are now measured. A trader evaluating the 61% probability should consider that the threshold for top-three placement has risen substantially; May 2026 would need to exceed most years from the pre-2020 era but faces competition from the recent record-setting cohort.

The key catalyst is the release of NASA's monthly temperature data, typically published in the first half of the following month. Traders should monitor preliminary atmospheric patterns and sea-surface temperature forecasts through May 2026, as El Niño or La Niña conditions materially influence global monthly anomalies. Any significant volcanic activity or solar forcing changes between now and May 2026 could alter baseline expectations. The settlement window closes 10 June 2026, providing a narrow window after NASA's data release for final position adjustments.

How this market resolves

Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a two-hour dispute window opens, and if no one stakes a counter-claim the payout is final. Contested outcomes escalate to UMA token-holder voting. Payouts clear in USDC to the winning side.

How to trade this market step by step

The mechanics for trading "2026 May 1st, 2nd, 3rd hottest on record?" are the same as any other PolyGram event contract. Each YES share resolves to $1 if the event happens, or $0 if it doesn't. The current price between 0¢ and 100¢ is the market's probability estimate, set live by the order book.

1. Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
2. Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
3. Pick a side. Buy YES if you believe the event will happen; buy NO if you think it won't. The current YES price reflects the market's collective probability.
4. Size your position. If you stake 100 USDC at 50% YES, you'll receive shares that pay $200 if YES resolves true — a 100% gross return. If NO resolves, your shares are worth $0.
5. Set risk controls (optional). Stop-loss, take-profit, and limit-order types all supported. Use the trade ticket's slippage box to cap your maximum entry price.
6. Wait for resolution. When the event resolves on-chain via the UMA optimistic oracle, the winning side settles to 100¢ automatically and USDC hits your balance within seconds. Withdrawable to any wallet you control.

How active is this market?

$65K in lifetime turnover and $66K of resting liquidity puts this market in the above the median by volume for global temp contracts on PolyGram. Order-book depth is exceptional — among the deepest order books in the category.

Last 24 hours alone saw $693 in turnover, consistent with the market's lifetime daily-average pace.

The market has been open for under a month — fresh enough that information asymmetry remains a real factor.

Higher-volume markets tend to have tighter spreads and faster price discovery — meaning the displayed YES/NO percentages are more likely to reflect the true crowd-implied probability rather than a single trader's directional view.

Key terms

YES / NO share

A binary outcome token that pays $1.00 if the underlying claim resolves true (YES) or false (NO), and $0 otherwise. The market price between 0¢ and 100¢ is the implied probability.

CLOB

Central limit order book. The matching engine that pairs YES buyers with NO buyers (effectively the same trade). Polymarket's CLOB on Polygon executes trades on-chain via the conditional-tokens framework.

Liquidity

USDC capital sitting in resting limit orders inside the order book. Deeper liquidity means smaller slippage on large trades and a tighter bid-ask spread.

UMA optimistic oracle

The on-chain dispute system that settles each Polymarket market. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution.

Slippage

The difference between the displayed mid-price and your fill price. Affects market orders most; limit orders avoid slippage but may take time to fill.

Conditional token

ERC-1155 outcome share issued by Gnosis Conditional Tokens on Polygon. The token type that resolves to $1.00 or $0.00 at settlement.

See the full prediction-market glossary →

Frequently asked questions

Risk and regulatory note

Prediction-market positions can lose 100% of staked capital. Outcomes are uncertain by definition — historical accuracy of crowd-implied probabilities is high in aggregate but not for any single market. PolyGram does not provide investment advice. Trade only with capital you can afford to lose.

Regulatory status varies by jurisdiction. Germany, the United States, and most EU countries treat Polymarket-style event contracts under one of three frameworks: financial derivative, gambling product, or unregulated novel asset. Consult local counsel before trading.

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