Highest temperature in NYC on July 9?

Platform comparison

Market context

The real-world event centres on the highest temperature recorded at LaGuardia Airport on 9 July 2026, a date that historically marks the peak of New York City’s summer heat. Current crowd-implied probability of 0% for the highest temperature range suggests traders believe conditions will remain well below extreme thresholds, yet this stands in stark contrast to the unprecedented heatwave that struck the region just days prior. On 3 July 2026, LaGuardia reached 104°F, shattering the 1966 record of 101°F by three degrees and marking the first time such extremes were measured in the modern era across a 500-mile corridor from Washington, D.C. to coastal New Jersey[1]. This historic breach, which also saw Central Park hit 100°F and midnight temperatures at LaGuardia climb to 94°F—breaking a record set in 2013[2][7], frames the current probability as potentially underestimating the lingering volatility of the season.

Traders should monitor operational advisories from major carriers like Delta, which have already flagged travel disruptions due to compounding heat and operational constraints at LaGuardia[9], as these often correlate with sustained high-temperature days. The catalyst for this market is the potential recurrence of the 104–106°F range, which some meteorologists fear could repeat within the same summer given the new, more volatile climate patterns[5]. While Polymarket and Kalshi diverge on decimal odds versus implied probability and fee structures, the 0% probability here reflects a consensus that the immediate post-heatwave cooling will dominate, though Betfair and Smarkets may offer different liquidity dynamics for contrarian positions. The settlement window ending 12:00 UTC on 9 July 2026 means any late-day spike could resolve the market unexpectedly, making real-time Wunderground data critical[3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in NYC on July 9? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.