Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Legal UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| 27°C | 100% |
| 24°C or below | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C or higher | 0% |
Market context
Mexico City's highest temperature on 24 July 2026 will be measured at Benito Juárez International Airport, the official weather station serving the capital. The settlement relies on historical data from Weather Underground, which archives daily temperature records for this location. Mexico City's altitude of 2,250 metres moderates temperatures year-round; July is the rainy season, typically bringing afternoon convection and cloud cover that suppresses peak daytime heat compared to drier months.
Historical July records at the airport show maximum temperatures clustering between 26 and 28 degrees Celsius, with rare excursions above 29°C. The 0% crowd probability suggests traders anticipate a specific temperature threshold that historical data makes unlikely. July's monsoon pattern—characterised by afternoon thunderstorms and high atmospheric moisture—typically limits sustained heating. Comparable July days from 2015 to 2024 provide a reliable baseline; extreme heat events in Mexico City are more common in May and June before the rains establish.
From a regulatory standpoint, this weather market operates under different jurisdictional frameworks depending on trader location. The German GlüStV classifies prediction markets as gaming products requiring operator licensing; US CFTC oversight applies to derivatives contracts, though weather markets often fall outside direct regulation if structured as information contracts. UK-based traders benefit from clarity under the Gambling Commission's exemption for prediction markets meeting transparency standards. Markets with settlement values under $1,500 typically avoid KYC requirements on certain platforms, lowering friction for casual participation, though this market's specific accessibility depends on the host platform's chosen compliance tier.
Methodology
This overview of Highest temperature in Mexico City on July 24? 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 Polymarket Legal UK?
- 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. Polymarket Legal 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Polymarket Legal UK exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Polymarket Legal UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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