Highest temperature in NYC on July 26?

Platform comparison

Market context

The relevant event is the highest reading at LaGuardia Airport on 26 July, and the market is effectively asking which temperature band the day’s peak will land in. On Polymarket, the leading bucket is currently 84–85°F at 41%, with 82–83°F next at 36%, so the crowd is leaning towards a warm but not extreme summer afternoon rather than a heat-spike outcome.[1]

Historically, that sort of distribution is typical when New York is warm enough for the mid-80s to be plausible but not so hot that the upper-80s or 90s dominate the book. The same market on Polymarket is quoted in probabilities by band, whereas Kalshi-style markets usually present prices in cents on the dollar and Betfair/Smarkets use decimal-style pricing and exchange mechanics, so the same view can look different across platforms even when the underlying weather expectation is similar.[1]

For traders, the main catalysts are the forecast updates on the morning of the 26th, any changes to cloud cover, sea-breeze strength, and the timing of peak solar heating before the settlement window closes at 12:00 UTC. Airport-specific maxima can diverge from central Manhattan if wind off the water suppresses the high, while a weak sea breeze or late-day clearing can lift the final print towards the mid-80s; the public weather forecast for New York on 26 July already points to a sunny day with a high around 28°C, which is consistent with the market’s current mid-80s focus.[2][3]

Sources: 1 · 2 · 3

Methodology

We read Highest temperature in NYC on July 26? 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

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.

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 UK 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 UK 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.