Resolution criteria on PolyGram: This market will resolve to the temperature range that contains the highest temperature recorded at the LaGuardia Airport Station in degrees Fahrenheit on 10 May '26. The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the LaGuardia Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ny/new-york-city/KLGA. To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
PolyGram is an on-chain prediction market where you trade YES or NO outcome shares with real USDC on Polygon. For this market, buy YES if you believe the event will happen, or NO if you think it won't. Your maximum loss is your stake — winning shares pay $1.00 each at resolution. Unlike sportsbooks, there is no house edge: prices are set by supply and demand from other traders and reflect the crowd's real-time probability.
Market outcomes
| 63°F or below | 0% YES | 100% NO |
| 64-65°F | 0% YES | 100% NO |
| 66-67°F | 0% YES | 100% NO |
| 68-69°F | 0% YES | 100% NO |
| 70-71°F | 0% YES | 100% NO |
| 72-73°F | 75% YES | 25% NO |
| 74-75°F | 20% YES | 80% NO |
| 76-77°F | 3% YES | 97% NO |
On 10 May 2026, the highest temperature recorded at LaGuardia Airport will fall within one of several defined ranges. The market settles based on Weather Underground's historical data for that specific date, with resolution occurring at 12:00 UTC. This represents a straightforward weather outcome with a single, verifiable data point from a major metropolitan airport station.
New York City's May temperatures typically range from 60°F to 80°F, though extremes occur. Historical May records at LaGuardia show a maximum of 94°F (set in 2000) and more typical highs clustering around 75–82°F depending on the specific week. The 0% implied probability currently reflected in Polymarket's order book suggests traders are pricing in either extremely low temperature ranges or minimal liquidity in the initial order book formation. Given May's seasonal patterns in the Northeast, outcomes in the 70–85°F band represent the statistical centre of gravity for this date.
Weather forecasting accuracy deteriorates sharply beyond ten days, making current predictions speculative. Traders should monitor late April and early May atmospheric patterns, particularly the position of high-pressure systems and any anomalous warming trends across the Northeast. The National Weather Service's medium-range forecasts, typically issued five to seven days before the event, will provide more actionable data. Any unusual spring heat waves affecting the Eastern seaboard in late April could shift expectations materially, though such forecasts remain inherently uncertain at this temporal distance.
This market settles from the official outcome published at https://www.wunderground.com/history/daily/us/ny/new-york-city/KLGA. A proposer submits the final result to the UMA optimistic oracle on Polygon; the two-hour dispute window closes and payouts clear in USDC.
The mechanics for trading "Highest temperature in NYC on May 10?" 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.
$156K in lifetime turnover and $983K of resting liquidity puts this market in the top 30% by volume for weather contracts on PolyGram. Order-book depth is exceptional — among the deepest order books in the category.
Last 24 hours alone saw $130K in turnover, well above the lifetime daily-average for this market — a clear sign of news catalysing trader activity right now.
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.
Resolution is sourced from https://www.wunderground.com/history/daily/us/ny/new-york-city/KLGA. Settlement is executed by the UMA optimistic oracle on Polygon, with a 2-hour dispute window before payouts clear.
This prediction market is scheduled to close on 10 May 2026. After the resolving event occurs, settlement typically clears within 24 hours once the UMA optimistic oracle confirms the outcome. All payouts are in USDC on the Polygon network.
To trade on this prediction market, create a free PolyGram account at polygram.ink, deposit USDC via Polygon, and place a YES or NO order on the outcome you believe in. You can learn more on our how-it-works page. Your maximum loss is limited to your stake — there is no leverage or margin.
When the outcome is determined, winning YES shares pay out $1.00 each in USDC, while losing shares pay $0. Settlement is handled by the UMA optimistic oracle on Polygon — a proposer submits the result, a two-hour dispute window opens, and if uncontested, payouts are distributed automatically. You can withdraw your winnings to any Polygon wallet.
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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