Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Legal UK) Pick polygram.ink (preferred broker) |
98% | 2% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
98% | 2% | 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 |
|---|---|
| 30°C | 98% |
| 31°C | 2% |
| 25°C or below | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C or higher | 0% |
Market context
Tokyo’s highest temperature on 27 July will be set by the day’s peak reading at Haneda Airport, and July is normally one of the city’s hottest months, with average summer temperatures in Tokyo around 25°C to 30°C and peak-season highs often moving above 30°C. Late-July conditions can push Tokyo well into the mid-30s because of humidity and the urban heat-island effect, so the market’s current 0% implied YES looks like a pricing out of an extreme daily high rather than a forecast that the station will stay cool.[1][2]
The historical frame matters because Tokyo’s July weather is usually driven by the transition out of the rainy season and into midsummer heat, with the rainy season often ending around 20 July and the hottest stretch following shortly after. Comparable accounts for Japan in July describe humid conditions, frequent heat above 30°C, and late-July highs of 35°C to 38°C as plausible in major cities, which helps explain why traders should read this market as a single-day weather outcome rather than a seasonal average.[1][4]
For accessibility and regulation, the practical question is whether the venue is available where the trader sits and whether account checks are required. In Germany, the GlüStV framework can make access to betting-style products more restricted, so location rules matter; in the US, CFTC reach is relevant because federally regulated derivatives and some event contracts can fall within US jurisdiction depending on structure and venue. “No-KYC up to $1,500” means a user may be able to transact without identity verification until cumulative activity hits that threshold, but that does not override geoblocking, tax reporting, or local onboarding rules on this specific market.
Methodology
This overview of Highest temperature in Tokyo on July 27? 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 Legal UK has a different geo footprint.
- 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.
- 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.
- 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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