Highest temperature in NYC on July 15?

Platform comparison

Market context

The market bets on whether LaGuardia Airport will hit a specific high on 15 July 2026, with the crowd currently assigning zero probability to the YES outcome. This implies traders are convinced the temperature will fall outside the selected range, likely clustering heavily around the 86–87°F bracket which holds a 100% implied probability on Polymarket[2]. Such extreme consensus often signals a fragile position, as weather markets rarely sustain 100% certainty without a definitive meteorological lock.

Historical mid-July data for New York City shows frequent spikes into the high 80s or low 90s, yet the recent July 2026 heatwave shattered records across the East Coast, breaking 14 to 154-year highs simultaneously[3]. This precedent suggests that while 86–87°F is the favourite, the underdog scenario of a record-breaking surge above 90°F remains a viable contrarian angle. The current 0% pricing on the YES side ignores the volatility introduced by this year’s active heat patterns, creating a potential value spot for traders willing to bet against the crowd’s rigid confidence.

Traders should monitor the National Weather Service’s daily forecasts for the New York area and real-time Wunderground updates for KLGA, the designated resolution source[1]. Any sudden shift in the Atlantic high-pressure system or incoming humidity could act as the catalyst for a temperature spike, challenging the consensus. With the settlement window closing at 12:00 UTC on 15 July, the market remains exposed to late-day fluctuations that could invalidate the current 100% probability assigned to the 86–87°F outcome[2].

Sources: 1 · 2 · 3

Methodology

This page reviews Highest temperature in NYC on July 15? 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.