Highest temperature in Tokyo on July 31?

Platform comparison

Market context

Tokyo is in the middle of the domestic summer heat season, and the settlement source keys off the single highest reading reported at Haneda on 31 July, so the relevant question is whether local daytime heating produces an outlier above the recent late-July norm. Tokyo’s July climate records show typical daily maxima around the low 30s Celsius, while a 2025 Tokyo dataset for Haneda had 31 July at 31.1°C, with nearby urban stations in the low to mid-30s on that date.[5][11]

The current 0% implied probability is best read as a thin-liquidity signal rather than a forecast that the event cannot happen. Recent Japanese heatwaves have repeatedly pushed readings above 40°C elsewhere in the country, including 41.2°C in Tamba on 30 July 2025 and nationwide record heat in late July 2024, which matters because Tokyo outcomes can move sharply if a broader heat dome reaches the capital.[7][9][13] For comparable framing, Tokyo’s all-time high at a city-history level has been put at 37°C in 2018, underscoring that Haneda can sit below the national extremes while still allowing a materially hot reading.[3]

On accessibility and regulation, a market like this sits in a zone where legal treatment depends on where the trader is located and which platform rules apply. German GlüStV constraints are relevant because weather-linked prediction products can be treated as gambling-style offerings rather than ordinary financial contracts under German law, while US CFTC reach is the key issue if a trader is in the United States and the venue is considered to offer derivatives or event contracts. “No-KYC up to $1,500” generally means small-value participation may be possible with lighter identity checks, but it does not remove geo-blocking, sanctions screening, or other jurisdictional limits, and it can affect whether a retail user can actually access the market at all.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Tokyo on July 31? 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 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.

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.

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).

What if regulation changes?

If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Polymarket Legal in Canada would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.