Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legit) Pick polygram.ink (preferred broker) |
96% | 4% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
96% | 4% | 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 |
|---|---|
| 19°C | 96% |
| 20°C | 2% |
| 21°C | 1% |
| 12°C or below | 0% |
| 13°C | 0% |
| 14°C | 0% |
| 15°C | 0% |
| 16°C | 0% |
| 17°C | 0% |
| 18°C | 0% |
| 22°C or higher | 0% |
Market context
On 18 July 2026, the highest temperature recorded at Minister Pistarini International Airport in Buenos Aires will determine the settlement outcome for this market. The airport's weather station, located in Ezeiza roughly 25 kilometres south-west of the city centre, serves as the official measurement point. July falls within Buenos Aires's winter season, when daily highs typically range between 13°C and 17°C, though variability across individual days remains substantial. The 0% crowd probability suggests traders currently perceive no meaningful chance of an extreme heat event during this mid-winter window.
Historical temperature records from the same station provide calibration for interpreting current odds. July extremes at Pistarini have occasionally reached 23–24°C on unusually warm winter days, whilst sub-5°C readings occur during cold snaps. The 2015 and 2017 winter seasons produced several days exceeding 20°C in July, demonstrating that whilst rare, such outcomes fall within plausible meteorological bounds rather than physical impossibility. The present 0% pricing may reflect either genuine confidence in a narrow range or insufficient liquidity to price tail-risk scenarios.
Traders should monitor Southern Hemisphere weather pattern forecasts from June onwards, particularly the position of cold fronts and any anomalous warm-air advection from the north. Argentina's meteorological service (Servicio Meteorológico Nacional) publishes extended outlooks; deviations from typical mid-winter conditions would signal shifting probabilities. Regulatory accessibility for this market depends on jurisdiction: UK and EU traders face no KYC requirements up to £1,200 equivalent, whilst US persons encounter CFTC restrictions on prediction market participation, and German operators must comply with GlüStV licensing frameworks.
Methodology
This overview of Highest temperature in Buenos Aires on July 18? 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 Is Kalshi Legit?
- 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. 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).
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