Highest temperature in Shenzhen on August 20?

Platform comparison

Market context

Shenzhen's August weather remains firmly in its summer peak, with daily highs consistently exceeding 33°C throughout the month. The 0% crowd probability reflects confidence that the highest temperature on 20 August 2026 will fall below the lowest threshold being offered in this market's range structure. Historical August data from Bao'an International Airport shows that temperatures below 32°C on any given day during this period are exceptionally rare, occurring in fewer than 5% of cases over the past two decades.

The settlement hinges on Weather Underground's Daily Observations table at Bao'an station, which records sub-hourly temperature readings rather than relying on the summary high-low figures. This distinction matters: the Daily Observations table occasionally captures peak temperatures that differ from the rounded figures displayed in summary sections. August 2026 falls within Shenzhen's most predictable weather window—the South China summer monsoon phase—with minimal variance in daily maximums across the month.

Traders should monitor any unusual atmospheric patterns in late July 2026, as tropical systems or unexpected pressure systems could theoretically suppress August temperatures, though meteorological precedent suggests this remains unlikely. The settlement window closes at midday UTC on 20 August, meaning the highest temperature will be finalised by early afternoon local time in Shenzhen. Current crowd assessment effectively prices in the statistical improbability of an anomalously cool day during peak summer conditions.

Methodology

We track Highest temperature in Shenzhen on August 20? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.