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

Market context

The market asks whether June 2026 will rank among the three hottest June months in the instrumental temperature record when measured by NASA's Global Land-Ocean Temperature Index. Settlement hinges on comparing June 2026's anomaly against all other June readings since records began, with ties counting toward qualification. The current order book on Polymarket implies a 21% probability of this outcome, reflecting trader assessment that the month will fall outside the top three.

Historical context shows June temperatures have grown warmer over recent decades. The three hottest Junes on record are 2023, 2024, and 2019, with 2024 setting the most recent record. June 2023 and June 2024 both exceeded +1.5°C above the 1951–1980 baseline. For June 2026 to rank in the top three, it would need to match or exceed the anomaly from June 2019 (approximately +0.93°C). The 21% probability suggests traders expect June 2026 to fall below this threshold, though with meaningful uncertainty given the trend toward warmer extremes.

Key dependencies for this market include El Niño or La Niña conditions developing through early 2026, which influence global temperature patterns significantly. Solar activity and volcanic aerosol loading also affect monthly anomalies. NASA publishes its monthly temperature data typically within the first two weeks of the following month, so June 2026 figures should appear by mid-July 2026. Traders should monitor climate forecasts from NOAA and the UK Met Office through spring 2026, as seasonal outlooks will refine expectations for northern hemisphere summer temperatures.

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 June 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?

$17K in lifetime turnover and $17K of resting liquidity puts this market in the below the median by volume for global temp contracts on PolyGram. Order-book depth is modest — expect a couple of cents of slippage on $1k+ trades.

Last 24 hours alone saw $87 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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