Highest temperature in NYC on July 5?

Platform comparison

Market context

On 5 July 2026, the LaGuardia Airport Station will record its peak temperature in degrees Fahrenheit, determining the outcome of a prediction market where the crowd currently assigns zero probability to a “YES” resolution. This real-world event hinges on whether the day’s high exceeds the threshold set by the market, a question framed by recent extreme heat. In the past week, LaGuardia reached 102°F, breaking a daily record and setting a new midnight high of 94°F, while nearby Newark and LaGuardia both hit 104°F under a massive dome of high pressure [1][4]. Historical data shows New York’s July average high is 85°F, yet extremes have climbed to 106°F in 1936, with July 2026 forecasts suggesting highs between 73°F and 96°F [2][8]. These comparable cases indicate that while 0% implied probability seems stark, the region has recently experienced temperatures well above typical averages, making the current crowd stance a point of divergence for traders comparing platforms like Polymarket (decimal odds) versus Kalshi (implied probability) or Betfair (fee structures and KYC reach).

Traders should monitor National Weather Service updates for LaGuardia, as well as Wunderground’s daily high records, which currently show a maximum of 93°F for the day, and watch for shifts in the high-pressure dome that has driven steamy air near the ground [9]. Recent forecasts suggest temperatures may soar to 104–105°F in New Jersey under the same dome, raising the risk of a similar spike in NYC [3]. The settlement window ends at 12:00 UTC on 5 July 2026, meaning any late-afternoon heat surge could alter the outcome. Platform differences matter here: Polymarket’s decimal odds may better capture tail risk than Kalshi’s implied probability, while Betfair’s lower fees could appeal to high-volume traders, and Smarkets’ KYC policies may limit access for some. The zero probability assigned by the crowd may reflect a lack of awareness of recent extremes, creating an opportunity for those who cross-reference data across platforms.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in NYC on July 5? 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 Kalshi Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Kalshi Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.

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. Kalshi Alternative 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.