Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
43% | 57% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
43% | 57% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 90-91°F | 43% |
| 88-89°F | 32% |
| 92-93°F | 12% |
| 86-87°F | 11% |
| 94-95°F | 3% |
| 85°F or below | 2% |
| 96-97°F | 1% |
| 98-99°F | 0% |
| 100-101°F | 0% |
| 102-103°F | 0% |
| 104°F or higher | 0% |
Market context
The market seeks to identify whether the highest temperature recorded at LaGuardia Airport on 10 August 2026 will exceed a specific threshold. The crowd currently assigns just 2% probability to a YES resolution, implying consensus expectation of a cooler-than-threshold day at the station.
New York's August heat patterns show considerable year-to-year variation, though extreme peaks remain uncommon. Historical data from LaGuardia indicates that temperatures exceeding 95°F occur in roughly 15–20% of August days across typical decades, whilst readings above 100°F are rare events concentrated in heat waves. The 2% implied probability suggests the market is pricing in either a notably cool August day or a threshold set well above typical August highs. For context, the National Weather Service's 30-year normals place the average August high at LaGuardia around 82°F, with the median daily maximum considerably below 90°F. This positioning leaves potential value for traders holding contrarian views on either the specific threshold or the likelihood of an anomalous heat event.
Traders monitoring this market should track seasonal weather patterns as August 2026 approaches, particularly any signals from extended-range forecasts issued in late July. The National Oceanic and Atmospheric Administration's Climate Prediction Center typically releases outlooks 2–3 weeks ahead that flag above or below-normal temperature probabilities across the Northeast. Any developing heat dome or ridge of high pressure over the eastern seaboard in early August could shift expectations materially. The resolution hinges entirely on Weather Underground's Daily Observations table at LaGuardia, making data quality and station continuity relevant considerations for settlement.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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