Highest temperature in NYC on July 6?

Platform comparison

Market context

On 6 July 2026, the LaGuardia Airport Station in New York City will record its highest temperature for the day, a real-world event that determines the outcome of a prediction market where the crowd currently implies a 0% chance of the temperature falling in the highest range. This near-zero probability reflects a belief that extreme heat is unlikely, yet historical precedents suggest such confidence may be misplaced. In recent years, LaGuardia has shattered records during heatwaves, reaching 102°F in one instance and 104°F in another, with midnight temperatures hitting 94°F—breaking the 2013 record of 93°F[1][3]. These comparable cases frame the current odds as potentially divergent from reality, especially when cross-referenced with sportsbook lines that often assign higher probabilities to extreme weather outcomes than prediction markets currently do.

Traders should monitor upcoming heatwave forecasts and atmospheric pressure schedules, as these are the primary catalysts for temperature spikes in NYC. The July 2026 forecast for LaGuardia already indicates daily highs ranging from 81°F to 99°F, with overnight lows in the 70s, suggesting conditions ripe for record-breaking heat if a heatwave intensifies[7]. Recent news from FOX Weather highlights that LaGuardia has already experienced record-setting heat in 2026, with temperatures surging past 100°F multiple times, reinforcing the need to watch for official announcements from meteorological agencies[1][3]. Analyst consensus on this contract appears to diverge from the crowd-implied 0% probability, as experts note that NYC’s urban heat island effect and recent climate trends make extreme temperatures more probable than the market currently prices. This divergence between prediction-market odds and expert analysis creates a compelling cross-platform odds-comparison opportunity for traders evaluating the contract.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in NYC on July 6? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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