Highest temperature in NYC on July 26?

Platform comparison

Market context

New York City’s official high on 26 July is the key settlement point here, and the market is pricing the day as a fairly modest summer heat outcome rather than a true scorcher. The crowd-implied probability sits at **0% for YES**, which makes the current consensus effectively that the highest temperature will land outside the target band; in handicapper terms, the favourite is the *under* on an unusually soft hot-day profile, and any upside surprise would be the contrarian angle.

That scepticism is easier to understand when set against the available weather context. A city forecast for 26 July points to a maximum around **28°C / 82°F**[2], while market pricing in related Polymarket listings has concentrated around the low-to-mid 80s Fahrenheit, with the **84–85°F** band and **82–83°F** band drawing the most interest[1]. That leaves little room for a blow-off heat event unless conditions run hotter than early expectations, so value would sit with traders who think the day can still nudge above the consensus band rather than with the market’s current hard lean to the downside.

The main catalysts are the day-of temperature path, not any formal announcement: cloud cover, humidity, wind direction, and whether the city gets full afternoon sunshine at LaGuardia will determine the eventual peak. Wego’s heat-wave guidance flags the usual window of greatest intensity as roughly **11am to 4pm** in hot spells[3], which is the period to watch for any upward revision in the maximum. For traders, the live read on whether LaGuardia clears the low-80s or stalls there is the deciding factor; absent an unexpected heat spike, the consensus remains anchored to a cooler finish than the market’s current distribution implies.

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

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.

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.

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.

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.