Highest temperature in NYC on July 8?

Platform comparison

Market context

New York City is locked into an intense heat wave that has pushed LaGuardia Airport to record-breaking highs, with the station hitting 104°F on July 2 and 94°F at midnight on July 4, shattering previous records for the warmest midnight temperature in the city's history[2][4]. This persistent surge means the 0% crowd-implied probability for lower temperature ranges on July 8 is not a statistical anomaly but a direct reflection of the atmosphere's current state, where dew points remain above 21°C and heat lingers with minimal cooling after sunset[2].

Historical precedents from the 2013 heat wave, when LaGuardia reached 93°F at midnight, and the 1966 record of 101°F, frame how traders should interpret the current odds: once such extreme heat establishes itself, daily highs rarely dip below the 85–90°F range without a significant shift in weather patterns[2][4]. The average high for July at LaGuardia is 86°F, yet the current forecast for July 2026 projects highs between 73°F and 91°F, with the heat wave pushing observations well above these norms[1].

Traders must watch for any official announcements from the National Weather Service regarding the potential arrival of a cold front or rain system, as these are the only catalysts capable of breaking the current heat dome[6]. Recent reports from Watchers.news confirm that the heat wave persists with little cooling, suggesting that unless a major weather event is scheduled within the next 24 hours, temperatures on July 8 will likely remain in the upper 80s or 90s[2]. The settlement window ends on July 8, 2026, at 12:00 UTC, leaving no time for delayed corrections once the day concludes.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in NYC on July 8? 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

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.