Highest temperature in Guangzhou on July 21?

Platform comparison

Market context

On 21 July 2026, the highest temperature recorded at Guangzhou Baiyun International Airport Station will fall into one of several defined ranges. This measurement will be sourced directly from Weather Underground's historical data for that specific date and location, with resolution occurring at 12:00 UTC. Guangzhou's summer climate typically produces daily highs between 32–35°C during mid-July, though extreme heat events can push readings above 37°C. The 0% crowd probability suggests either insufficient trader participation or confidence that the market's temperature bands do not capture the actual outcome—a common dynamic in niche weather markets where historical volatility remains underpriced.

Comparable July temperature records for Guangzhou show considerable year-to-year variation. The city recorded 38.9°C on 13 July 2022 during an intense heatwave; however, many July days cluster around 33–34°C. Traders should note that airport station readings often differ from urban core measurements due to surface characteristics and ventilation patterns. The settlement window's noon cutoff means only temperatures recorded before that time count, potentially excluding afternoon peaks that typically occur between 14:00 and 16:00 local time.

From a regulatory standpoint, this market operates under German GlüStV provisions where applicable to EU-based traders, whilst US CFTC reach extends to American participants through Commodity Exchange Act definitions of prediction contracts. The no-KYC threshold of $1,500 USD applies to aggregate positions; traders exceeding this exposure must complete identity verification. For this specific market, that accessibility ceiling permits meaningful participation without full onboarding, though larger positions trigger standard compliance requirements.

Methodology

This overview of Highest temperature in Guangzhou on July 21? 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.

What happens during a tax audit?

You're responsible for documenting your trades. Polymarket Legal UK exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.

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.