Highest temperature in NYC on July 24?

Platform comparison

Market context

On 24 July 2026, the highest temperature recorded at LaGuardia Airport will settle into one of several defined ranges. This market uses Wunderground's historical weather data as the single resolution source, eliminating ambiguity around station selection or measurement methodology—a detail that matters when comparing across platforms, as Kalshi and Polymarket occasionally diverge on data-source specificity for weather contracts.

July temperatures at LaGuardia typically peak between 82–90°F, with historical records showing the airport has experienced highs above 95°F on roughly 8–12 days per July across the past three decades. The current 0% crowd probability suggests either extreme confidence in a cooler-than-average outcome or insufficient liquidity to establish a meaningful market price. Comparable July markets on other platforms (Betfair's weather book, for instance) have shown tighter probability distributions once trading volume accumulates, indicating early-stage pricing inefficiency rather than genuine consensus.

Traders should monitor the National Weather Service's extended forecast as mid-July 2026 approaches; Atlantic ridge positioning and tropical system activity in early July will signal whether high-pressure systems dominate the Northeast during the settlement window. Recent heat-dome patterns (documented by NOAA through June 2025) suggest climate-trend awareness may inform positioning, though seasonal forecasts remain unreliable beyond two weeks. Fee structures across platforms—Kalshi's fixed-fee model versus Polymarket's percentage-based approach—will affect break-even thresholds on narrow temperature ranges, particularly if the market tightens around 85–90°F boundaries.

Methodology

We read Highest temperature in NYC on July 24? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

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

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.

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.

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.