Highest temperature in NYC on July 12?

Platform comparison

Market context

New York City is locked into an unprecedented July 2026 heatwave, with LaGuardia Airport smashing its all-time record just days ago by hitting 104°F on 3 July, a figure that eclipsed the 1966 benchmark by three degrees. This extreme thermal event has persisted through the holiday weekend, leaving the region with dangerously high overnight lows, including a record-breaking 94°F midnight reading at LaGuardia. The crowd-implied probability for the highest temperature on 12 July sits at 0% YES for any range above freezing, suggesting the market has completely mispriced the likelihood of continued summer heat, effectively treating the date as a cold-weather anomaly despite the active, record-shattering conditions.

Historical data from the 1966 heatwave and this current 2026 event shows that peak temperatures in NYC often cluster within a narrow window during sustained heatwaves, yet the market is pricing in a near-total dismissal of any significant warmth. The consensus is heavily skewed toward the 96–97°F range at 100% probability on Polymarket for the 4 July event, but for 12 July, the 0% implied probability for any temperature suggests a fatalistic contrarian angle where traders are ignoring the momentum of the current atmospheric ridge. Value likely sits in betting on the 98–99°F or 100–101°F ranges, as the persistence of 94°F overnight lows indicates the heat will not dissipate quickly.

Traders must monitor the National Weather Service’s daily heat advisories and the specific trajectory of the high-pressure system currently dominating the East Coast, as any shift could alter the settlement temperature. Recent reporting from Medical Daily confirms the 2026 heatwave has broken records across a 500-mile corridor, with LaGuardia reaching 104°F, reinforcing that the atmospheric conditions remain static and hostile to cooling trends. The settlement window closes at 12:00 UTC on 12 July 2026, meaning the final reading will capture the peak of this lingering thermal event, making the current 0% probability a clear mispricing of the real-world risk.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in NYC on July 12? 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.