Highest temperature in NYC on July 9?

Platform comparison

Market context

The LaGuardia Airport Station in New York City recently recorded a blistering 104°F on July 3, 2026, shattering a 60-year record and marking the start of an unprecedented East Coast heatwave that killed 29 people in neighbouring New Jersey. This extreme event, which saw simultaneous record-breaks across a 500-mile corridor during a holiday weekend, establishes a context where the current 0% crowd-implied probability for a high temperature on July 9 appears dangerously detached from recent meteorological reality.

Historical data suggests that July 9 has previously hosted the city’s highest recorded temperature of 106°F, and the current heat dome shows no signs of immediate dissipation despite the recent peak. Traders should monitor the persistence of the heat dome and any scheduled declarations from local climate authorities regarding emergency cooling measures, as the market is leaning heavily on the catalyst of sustained high-pressure systems rather than transient fluctuations. According to a recent report from Medical Daily, the July 2026 heatwave broke records that had stood for up to 154 years, indicating that the atmospheric conditions remain volatile and capable of producing another extreme spike.

The settlement window ending in 2026 allows ample time for further weather developments, yet the immediate catalyst remains the stability of the current heat dome over the tri-state area. Recent campaign-finance disclosures from local environmental groups have highlighted increased funding for heat-resilience projects, which may influence public perception but not the raw temperature data sourced from Wunderground. With the heat lingering into the night at 94°F at midnight, as noted by FOX Weather, the probability of a repeat or higher peak on July 9 warrants serious attention despite the current market pricing.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in NYC on July 9? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.