Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 90-91°F | 100% |
| 81°F or below | 0% |
| 82-83°F | 0% |
| 84-85°F | 0% |
| 86-87°F | 0% |
| 88-89°F | 0% |
| 92-93°F | 0% |
| 94-95°F | 0% |
| 96-97°F | 0% |
| 98-99°F | 0% |
| 100°F or higher | 0% |
Market context
The real-world event is the highest Fahrenheit temperature recorded at LaGuardia on 9 August 2026, with settlement tied to Weather Underground’s **Daily Observations** rather than the summary high-and-low box. That distinction matters because the market resolves to the day’s recorded peak in the station log, so a late-afternoon or evening revision in the observation feed can matter more than the headline display; the market description also states that revisions are considered until the first datapoint for the following date is published.[4]
The current **0% YES** crowd price is best read against late-summer New York norms rather than a single forecast run. August climatology for New York City is around the low- to mid-80s Fahrenheit, while recent daily reporting around the event showed LaGuardia already posting an 88.0°F latest report with a 6-hour high of 89.1°F, and NWS daily climate data for nearby NYC had an 87°F maximum the previous day.[1][3][7] That combination suggests the market is pricing an outcome above the observed range or assuming the temperature bining is misaligned, rather than a simple lack of heat.
For accessibility, the regulatory frame is straightforward but relevant: under Germany’s GlüStV regime, prediction-market participation can be constrained where products are treated as gambling-like rather than pure financial instruments, while the US CFTC can reach event-contract activity when it falls within derivatives-style oversight, especially for US-facing access.[4] A “no-KYC up to $1,500” structure means a small user can typically enter without full identity verification until cumulative activity crosses that threshold, but it does not remove geoblocking, sanctions screening, or platform rules on jurisdictional access. Traders should watch the Weather Underground station feed around the close window, because the final published observation is the settlement input, and any discrepancy with the summary high is immaterial under the market terms.[4]
Methodology
This overview of Highest temperature in NYC on August 9? 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
- Do I need to KYC for Is Kalshi Legal in California?
- Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.
- 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 Legal in California 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Kalshi Legal in California exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- 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.
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