Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legit) Pick polygram.ink (preferred broker) |
81% | 19% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
81% | 19% | 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 |
|---|---|
| 28°C | 81% |
| 29°C | 14% |
| 30°C | 4% |
| 31°C | 1% |
| 23°C or below | 0% |
| 24°C | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 32°C | 0% |
| 33°C or higher | 0% |
Market context
Tokyo Haneda Airport is expected to face peak summer heat on 13 July 2026, with forecast highs ranging between 29°C and 31°C, while the current market assigns zero probability to any outcome exceeding the settlement threshold implied by the 0% YES price. Historical data shows Japan recorded its highest-ever temperature of 41.2°C in Tamba City in late July 2025, yet Haneda typically remains cooler due to coastal exposure and urban airflow patterns, making extreme outliers less likely than inland spikes [5][1]. The 0% crowd-implied probability suggests traders view a breach of the implied upper bound as statistically negligible given recent regional trends and the station’s specific microclimate.
Regulatory framing remains critical for accessibility: German GlüStV implications mean platforms must verify user identity for bets exceeding €1,500, while US CFTC reach extends jurisdiction over prediction markets offering binary outcomes tied to real-world events. The “no-KYC up to $1,500” clause allows traders to access this market without identity verification if their position stays under that limit, enhancing liquidity from anonymous participants but limiting institutional participation. Traders should monitor the Japan Meteorological Agency’s weekly heat advisories and any sudden shifts in the 7-day forecast for Haneda, as these serve as primary catalysts for probability recalibration [4]. A Reuters report on Japan’s 2025 heat record underscores the volatility of summer temperatures, though Haneda’s proximity to the bay typically moderates extremes compared to inland cities [5].
Methodology
This overview of Highest temperature in Tokyo on July 13? 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 Legit has a different geo footprint.
- 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Kalshi Legit exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- 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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