Highest temperature in Shanghai on August 18?

Platform comparison

Market context

On 18 August 2026, the highest temperature recorded at Shanghai Pudong International Airport Station will determine the settlement outcome of this market. Resolution relies on the Daily Observations table from Weather Underground rather than summary figures, a distinction that matters when intraday peaks diverge from reported highs. The current crowd probability of 0% suggests traders expect the actual peak to fall outside the upper temperature ranges offered, or that uncertainty about the exact measurement methodology is suppressing participation.

Shanghai's August climate is characterised by high humidity and temperatures typically ranging between 24–34 °C, though peaks above 35 °C occur in roughly one-third of years during this period. Historical August data from Pudong station shows considerable year-to-year variation; the 2023 August peak was 36.8 °C, whilst 2022 saw 37.5 °C. The 0% probability may reflect either conservative market positioning ahead of the 2026 settlement window or sparse liquidity in temperature prediction markets generally. Comparable weather markets on prediction platforms show that extreme-temperature ranges often attract minimal trading volume until within days of the event.

Traders should monitor China Meteorological Administration forecasts released in mid-August 2026, particularly any alerts regarding heat waves or tropical systems affecting the Yangtze River Delta region. Typhoon activity in late summer can suppress temperatures significantly. From a regulatory standpoint, this market operates under German GlüStV provisions if accessed from the EU, whilst US CFTC oversight applies to US persons; most platforms offer no-KYC access up to $1,500 notional exposure, permitting casual participation without identity verification for smaller stakes on weather events.

Methodology

This overview of Highest temperature in Shanghai on August 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.

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 Kalshi Legit would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.