Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
47% | 53% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
47% | 53% | 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 | 47% |
| 92-93°F | 27% |
| 94-95°F | 22% |
| 96-97°F | 6% |
| 87°F or below | 0% |
| 88-89°F | 0% |
| 98-99°F | 0% |
| 100-101°F | 0% |
| 102-103°F | 0% |
| 104-105°F | 0% |
| 106°F or higher | 0% |
Market context
The event is the day’s **highest recorded temperature** at William P. Hobby Airport in Houston, measured in Fahrenheit. July in Houston is typically hot, with average temperatures around 77°F to 96°F, and recent local weather histories show highs in the mid-90s, so a 0% YES probability implies the market is currently pricing in a very narrow or absent path to the relevant temperature band rather than a cool day. [1][2]
For comparable framing, the market is not about the forecast at a single hour but the peak reading logged by the station before settlement, which means late-morning heating, afternoon cloud cover, and any rain-cooled air can matter more than early readings. In practice, these summer Houston markets usually turn on whether the day reaches or exceeds the low-to-mid 90s rather than on small changes around the forecast average, because the resolution source is the station’s observed daily maximum rather than a model estimate. [1][2]
From a market-access perspective, the regulatory backdrop matters. German GlüStV constraints can affect whether residents can lawfully access betting-style products, while the US CFTC’s reach is relevant because event contracts tied to weather are closely watched under US derivatives rules. “No-KYC up to $1,500” generally means a user may be able to transact below that threshold with lighter identity checks, but that does not remove local gambling, sanctions, tax, or platform eligibility restrictions for this specific market.
Methodology
This overview of Highest temperature in Houston on July 23? 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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