Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legit) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 86-87°F | 100% |
| 75°F or below | 0% |
| 76-77°F | 0% |
| 78-79°F | 0% |
| 80-81°F | 0% |
| 82-83°F | 0% |
| 84-85°F | 0% |
| 88-89°F | 0% |
| 90-91°F | 0% |
| 92-93°F | 0% |
| 94°F or higher | 0% |
Market context
On 19 August 2026, the highest temperature recorded at LaGuardia Airport Station will fall into one of several defined ranges. The National Weather Service maintains continuous observation data at this primary New York station, and Weather Underground's Daily Observations table—rather than its summary high-low display—will serve as the authoritative settlement source. This distinction matters operationally: the Daily Observations record captures sub-hourly readings, whereas summary tables may aggregate differently. August in New York typically sees highs between 80–88°F, though heat waves can push readings into the low 90s.
Historical August temperatures at LaGuardia show considerable year-to-year variance. The 30-year normal high for mid-August sits near 82°F; however, 2021 saw a peak of 91°F on 19 August, whilst 2015 recorded 86°F on the same date. The current 0% crowd probability suggests traders are pricing in either exceptionally cool conditions or uncertainty about the resolution mechanics themselves. Given that August heat events in the Northeast often correlate with Atlantic high-pressure systems and Gulf moisture transport, seasonal patterns favour temperatures in the 80–87°F band as baseline expectation.
From a regulatory standpoint, this market operates under differing frameworks depending on trader jurisdiction. US-based traders face CFTC oversight of prediction markets; the agency's guidance on event contracts remains unsettled for weather derivatives. German traders encounter GlüStV (gambling licensing) requirements, though many EU jurisdictions exempt prediction markets from gaming regulation. Platforms offering no-KYC access up to $1,500 notional exposure typically rely on this threshold to avoid triggering full anti-money-laundering protocols, though this exemption varies by regulator and does not eliminate underlying compliance obligations for the operator.
Methodology
This overview of Highest temperature in NYC on August 19? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
FAQ
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legit stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
- Are prediction markets gambling?
- Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
- Is there a withdrawal cap?
- No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legit would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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