Highest temperature in Shenzhen on August 10?

Platform comparison

Market context

Shenzhen’s reading for the day will come down to the highest temperature logged at Shenzhen Bao’an International Airport, using Weather Underground’s Daily Observations table rather than the site’s headline high/low summary. For a programmatic workflow, that means polling the station page, extracting the intraday observation series, and mapping the maximum Celsius value into the market’s settlement bands; a small difference of a few tenths can matter if the result sits near a bracket edge.[6][15]

Historically, Shenzhen in August sits in the low- to mid-30s Celsius, with individual days often pushing into the high 30s under clear or partly cloudy conditions. Recent history shows the airport reaching 36.6°C on 9 August 2026, while broader August climate references put the monthly average high around 32–33°C, which frames why the market can still be sensitive to one hot afternoon even when the crowd is pricing little upside.[7][8][13]

For traders running bots or conditional orders, the main catalysts are the midday heat peak, any shift in cloud cover or convective showers, and whether the airport station records a late-afternoon high after the first forecast updates. AccuWeather’s same-day guidance has pointed to a very hot, mostly clear day with a forecast high around 97°F and a 3 pm peak, while Timeanddate and Tutiempo show only limited precipitation risk around the middle of the day, which is the sort of setup that can leave the settlement temperature dependent on a narrow intraday spike.[9][10][12][17]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Polymarket Review UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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%.