Highest temperature in NYC on July 16?

Platform comparison

Market context

A strong summer heatwave is gripping the Northeastern United States, with New York City forecast to reach 97°F on 16 July 2026 at LaGuardia Airport. This intense high-pressure system, coupled with humidity levels pushing dew points above 70°, creates the specific conditions required for the market to resolve as YES. The settlement window closes at 12:00 UTC on the settlement date, capturing the peak daily temperature recorded by the Wunderground source.

Historical July data in NYC shows that temperatures exceeding 95°F are uncommon but not unprecedented during sustained heat events, with the last 100-degree day occurring twelve years ago. The current crowd-implied probability of 59% YES aligns closely with the frontrunner outcome of 92–93°F on Polymarket, which sits at 35%, suggesting traders are pricing in a higher likelihood of the upper range than the single outcome implies. This divergence between the binary market probability and the specific temperature-range odds indicates a bullish sentiment on extreme heat that sportsbook lines on similar weather contracts have not yet fully reflected.

Traders should monitor the weakening of the high-pressure system expected after 16 July, as a cold front moving in from the west could bring cooler air and showers by 17 July, potentially capping the peak temperature if the front arrives earlier than forecast. Recent reports from AccuWeather confirm the heatwave is expected to last four days with Thursday and Friday potentially hitting 100°F, reinforcing the current market stance. The key dependency remains the timing of the cold front, as any delay could push temperatures higher, while an early arrival might keep the day below the threshold.

Sources: 1 · 2 · 3

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.