Highest temperature in NYC on July 9?

Platform comparison

Market context

The underlying event is the peak of a record-breaking East Coast heatwave, where LaGuardia Airport has already shattered daily highs by reaching 102°F on Thursday, with midnight temperatures lingering at 94°F. This extreme thermal baseline frames the current market probability of 0% for a lower temperature range, suggesting the crowd views any outcome below the current heat as virtually impossible. Historical precedents from July 2013 and the recent July 4, 2026 record confirm that once such a heat dome establishes, daily highs rarely dip below 90°F, making the consensus heavily skewed toward the upper extremes of the temperature spectrum.

Traders should monitor the National Weather Service’s hourly forecasts for LaGuardia, as a sudden shift in wind direction or cloud cover could act as the primary catalyst for a temperature drop, though current models predict sustained highs between 73°F and 91°F for the remainder of the month. Recent reporting from FOX Weather highlights that the heatwave is persisting with no immediate relief, reinforcing the contrarian angle that betting against the current 0% probability is a high-risk value spot only if a significant atmospheric disruption is announced. The value likely sits in the higher temperature brackets, as the crowd’s dismissal of lower ranges ignores the rare but possible scenario of a rapid cooling front, yet the data strongly supports the frontrunner status of the upper heat ranges.

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Methodology

This page reviews Highest temperature in NYC on July 9? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win 2026, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win 2026 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.