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 |
|---|---|
| 96-97°F | 100% |
| 87°F or below | 0% |
| 88-89°F | 0% |
| 90-91°F | 0% |
| 92-93°F | 0% |
| 94-95°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
Houston’s outcome here is the **highest temperature** recorded at William P. Hobby Airport on 3 August 2026, a station-specific measure rather than a citywide average, so late-morning warming, cloud cover, and any afternoon showers all matter more than the broad daily forecast headline. Current market pricing at 0% YES implies traders are treating an upper-end heat reading as unlikely, but August in Houston is normally hot enough that a single clear, dry day can still produce a sharp intraday peak above the expected range.[3][14][16]
Recent forecasts point to heat rather than a major cooldown. One local forecast said Houston would be “generally sunny” with a high of 96°F, while another described temperatures reaching around 100°F with only a modest late-afternoon storm chance; Houston Chronicle also reported highs flirting with 100°F through midweek before easing back later in the week.[3][8][14][18] Comparable August climatology is consistent with elevated heat: Houston’s August average temperature is in the mid-80s Fahrenheit, so a reading in the 90s is normal enough to be plausible, but the exact station high can still be pulled down by clouds or convective storms.[15][16]
For accessibility, the main trading frictions are regulatory rather than meteorological. A venue operating under German-facing rules may fall within the GlüStV framework, which can affect advertising, onboarding and product availability, while US-based operators remain exposed to CFTC reach if a contract is treated as a regulated derivatives product. “No-KYC up to $1,500” usually means a user can access the market and trade within that cap without full identity verification, but larger deposits, withdrawals, or higher-volume activity typically trigger KYC checks, so access to this specific market may be simple for small positions and more restrictive once limits are approached.
Methodology
This overview of Highest temperature in Houston on August 3? 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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