Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Polymarket Legal in Canada) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open the market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open the market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open the market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open the market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open the market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 33°C | 100% |
| 30°C or below | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C | 0% |
| 39°C | 0% |
| 40°C or higher | 0% |
Market context
Tokyo’s late-summer heat means the relevant outcome is the day’s *peak* reading at Haneda Airport, not the average or the forecast high for central Tokyo. August is typically the hottest month in the city, with average highs around 30–31°C and occasional spikes into the mid-30s Celsius, while recent August forecast ranges for Tokyo sit roughly in the low 30s to around 90°F/32°C[1][2][7][13]. That makes a 0% crowd-implied probability vulnerable to rapid repricing if the morning starts warm, skies stay clear, and the airport station records an early afternoon maximum above the lowest settlement bands.
The historical framing is straightforward: comparable August climate data suggest that readings near 31–34°C are normal, but hotter days are frequent enough that a single strong heat burst can move the settlement range materially[3][5][9]. For market reading, the key distinction is between *typical* August weather and the specific station-level maximum on a single date; Haneda can run a little differently from citywide averages because coastal breezes, cloud cover, rain bands and sea-breeze timing can suppress or delay the day’s top value. Recent Tokyo August guidance from major weather services also points to daily highs commonly in the low-to-mid 30s Celsius, which supports the view that a non-zero outcome remains meteorologically plausible even if the crowd currently prices it at zero[7][17].
From a trading-access standpoint, the market sits in a cross-border regulatory grey zone. German GlüStV rules can matter because even freely accessible prediction contracts may be treated as gambling-like products if offered to German residents without the relevant authorisation, so accessibility can be restricted by geo-blocking or account limitations rather than by the weather itself. In the US, CFTC reach is relevant where a contract may be viewed as a derivatives-style event market; that can affect who may lawfully access or advertise it, depending on venue structure. “No-KYC up to $1,500” usually means a user can open or fund an account and trade up to that cumulative threshold without identity verification, but access may still depend on residence checks, sanctions screening, and platform-specific location restrictions, so it does not guarantee availability to every participant for this market.
Methodology
This overview of Highest temperature in Tokyo on August 2? 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 Polymarket Legal in Canada has a different geo footprint.
- Do I need to KYC for Is Polymarket Legal in Canada?
- 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Polymarket Legal in Canada 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).
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