Highest temperature in NYC on July 4?

Platform comparison

Market context

A severe, multi-day heat wave is currently gripping the eastern United States, with Washington, DC already shattering records at 102°F and New York City forecast to approach 100°F this Fourth of July. This extreme thermal event has triggered emergency room visits for heat-related illnesses and forced NYC to open numerous cooling centres while dispatching mobile medical vans to provide water and wellness checks. The atmosphere is thick with record-breaking potential as the heat shifts slightly southward on Saturday, maintaining dangerous conditions for holiday festivities across the Mid-Atlantic and Northeast.

Historical data frames the current 0% YES probability as a stark anomaly, given LaGuardia Airport’s all-time high of 107°F recorded on 3 July 1966, and recent trends showing July highs routinely reaching 99°F. With the current forecast indicating daily highs between 81°F and 99°F for July 2026, and the heat index soaring to 105°F, the market appears to be ignoring the potent combination of a multi-day record-breaking wave and the station’s documented capacity for extreme temperatures. Traders should watch for official Wunderground updates confirming the peak temperature, as the current crowd-implied probability contradicts the physical reality of this unprecedented heat event.

Key catalysts include the official release of the highest temperature recorded for all times on 4 July 2026 at LaGuardia Airport via Wunderground, which will settle the market by 12:00:00Z on 4 July 2026. Recent reports from CNN highlight that over a dozen areas across the Mid-Atlantic and Northeast have already broken or matched previous high-temperature records, suggesting NYC’s forecast of 100°F is a conservative estimate rather than a ceiling. The settlement window closes at 12:00:00Z on 4 July 2026, meaning the next official temperature reading will be the definitive resolution source for this prediction market.

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Methodology

Football-specific comparison page for Highest temperature in NYC on July 4?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

Are prediction markets better than sports betting?

Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

Which sports markets are available?

Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.

How fast do sports winnings settle?

Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.