Highest temperature in NYC on July 8?

Platform comparison

Market context

On 8 July 2026, the highest temperature recorded at LaGuardia Airport in New York City will determine the outcome of this prediction market, with the current crowd-implied probability of a YES result sitting at 0%. This reflects the market’s view that the temperature will not reach the threshold required for a positive resolution, despite the region’s recent heatwave activity.

Historical data frames this probability sharply: in a record-breaking heat event earlier this year, LaGuardia reached 102°F during the day and 94°F at midnight, the highest midnight temperature ever recorded for NYC[1][6]. However, July 2026 forecasts from AccuWeather suggest daily highs between 73°F and 91°F, with overnight lows significantly lower, indicating a much cooler profile than the 2026 heat spike[4]. This divergence between past extremes and current expectations underpins the 0% YES pricing.

Traders should monitor real-time updates from Wunderground, the official resolution source, and watch for any sudden shifts in weather patterns or official announcements from the National Weather Service regarding heat advisories[1]. A recent FOX Weather report highlighted how quickly record temperatures can emerge during East Coast heatwaves, making on-the-ground data critical for assessing conditional token outcomes on the Polygon network using USDC[1]. The settlement window closes at 12:00 UTC on 8 July 2026, so timely data ingestion is essential for accurate on-chain positioning.

Sources: 1 · 2 · 3 · 4 · 5

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

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 Kalshi UK. 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.

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 Kalshi UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.