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
LaGuardia’s recorded daytime maximum on 8 August is the real-world trigger here, and Weather Underground’s *Daily Observations* table, not the summary high/low box, decides the settlement band. By late evening local time, nearby official reporting already showed a warm day in the city, with the National Weather Service’s climatological report listing Central Park’s previous-day maximum at 91°F and the NWS spot forecast still in the upper 70s to low 80s after sunset, while WeatherSpark’s latest KLGA report showed 89.1°F earlier in the afternoon[5][6][2].
For a market currently priced at 0% YES, the main historical frame is that New York summer highs can move within just a few degrees from one forecast cycle to the next, but once the observed airport temperature is broadly known the remaining uncertainty usually comes down to the exact band and the platform’s source hierarchy. Polymarket’s own event page says the resolution uses the LaGuardia daily history page and that late revisions are counted only until the next day’s first datapoint is published, which means traders should read the displayed probability as a snapshot of the crowd’s view of that final logged reading rather than a broad citywide temperature sentiment[4].
Regulatory and access context matters as much as the weather print. Prediction markets offered to users in Germany can implicate the GlüStV framework because event contracts may be treated as gambling-like products unless a local approval basis exists, while US-facing venues can still sit within the CFTC’s reach where a contract is treated as a derivative rather than a pure wager. “No-KYC up to $1,500” generally means a user can access the market and trade within that cumulative threshold without full identity verification, but once activity or balances exceed the platform’s limit, additional KYC steps are typically required before further use.
Methodology
This overview of Highest temperature in NYC on August 8? 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
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Is Kalshi Legal in California has a different geo footprint.
- 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.
- 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 Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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