Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
44% | 56% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
44% | 56% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 90-91°F | 44% |
| 92-93°F | 30% |
| 94-95°F | 19% |
| 96-97°F | 6% |
| 98-99°F | 1% |
| 87°F or below | 0% |
| 88-89°F | 0% |
| 100-101°F | 0% |
| 102-103°F | 0% |
| 104-105°F | 0% |
| 106°F or higher | 0% |
Market context
At William P. Hobby Airport, the question is simply whether the day’s *high* will land in a given Fahrenheit band before the market’s settlement window closes. With the crowd at **0% YES**, the market is pricing in an outcome that the day will not reach the relevant temperature threshold, which is a strong signal only if the forecast setup remains unusually cool or cloud-locked for Houston standards.[1]
Historical framing matters because Houston summer highs often sit in the upper 80s to mid-90s, and the cited local conditions snapshot shows a recent day in the city reaching **95°F** despite only light winds and some fog.[1] For reading the current price, comparable warm-season cases suggest that a 0% crowd-implied probability is usually more about the specific threshold and timing than about whether it will be hot at all; the key issue is whether Hobby Airport manages to touch the top of the distribution before the daily cutoff.
From a regulatory and access perspective, this is the sort of market that can be influenced by local weather data while still sitting inside broader prediction-market rules. In Germany, the GlüStV regime can affect whether residents can access such contracts at all, while in the United States the CFTC’s reach is the relevant federal overlay for event-contract platforms. On the platform side, “no-KYC up to $1,500” generally means smaller accounts may trade with lighter identity checks, which makes the market easier to access for casual users but does not change the underlying settlement source or contract rules.
Sources: 1
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. Polymarket Tax UK has a different geo footprint.
- 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. Polymarket Tax UK 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).
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