Highest temperature in NYC on July 23?

Platform comparison

Market context

New York’s late-July heat is being priced mainly as a *modest* daytime high rather than a surge into the upper 80s or 90s, with the market currently leaning hard towards the **80-81°F** band. That fits a pattern seen in summer weather markets: once a specific airport station is used for settlement, outcomes tend to cluster around the local forecast rather than the citywide “feels like” temperature, and the highest reading matters more than the midday average.

The historical frame here is a recent New York heat spell that *did* produce records across the East Coast earlier in July, showing how quickly a warm pattern can extend and how sensitive short-dated temperature markets are to synoptic shifts. But the current pricing is not assuming a repeat of that extreme setup; it is instead treating the day as one where ordinary summer warmth is still most likely. A useful comparison is the earlier July 2026 NYC temperature market, which resolved in the low 70s, underlining how even in midsummer the airport’s peak can undershoot broader expectations.

For traders, the key catalyst is the *final local forecast* for LaGuardia, especially any shift in cloud cover, humidity, sea-breeze timing, or thunderstorm risk that could cap the afternoon high. The market is leaning on the latest weather-service model consensus rather than any event-driven catalyst, so the main watchpoints are updates from forecasters and the observed evolution of the day’s warming curve, not scheduled announcements. With settlement tied to the station’s recorded maximum on Wunderground, late-arriving convection or an earlier-than-expected sea breeze would matter more than headline city temperatures.

Sources: 1 · 2 · 3

Methodology

This page tracks Highest temperature in NYC on July 23? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

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.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

Are political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.

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.