Highest temperature in Shenzhen on August 16?

Platform comparison

Market context

Shenzhen's August heat will peak on the 16th, with the settlement hinging on the precise reading captured at Bao'an International Airport's weather station rather than summary figures elsewhere. The 0% crowd probability reflects either extreme confidence in a specific temperature band or sparse trading activity on this granular weather market. Recent meteorological patterns across southern China have shown typical late-summer monsoon influence, though August 2026 forecasts remain preliminary given the settlement window extends into next year.

Historical August temperatures at Shenzhen Bao'an typically range between 32–35°C for daily highs, with occasional spikes above 36°C during heat waves. The distinction between Weather Underground's Daily Observations table and its Day High & Low summary matters operationally; the former captures minute-by-minute station data whilst the latter may smooth or adjust readings. Past resolution disputes on weather markets hinge on such methodological differences, making source specification critical. August 2025 data, once available, will provide the most relevant comparable baseline for traders calibrating their expectations.

Traders should monitor tropical cyclone activity in the Western Pacific during July and early August 2026, as storm systems can suppress temperatures or trigger sudden heat surges depending on timing and proximity. The China Meteorological Administration typically issues seasonal forecasts by June, which may signal whether August 2026 leans toward above or below-normal conditions. Any significant weather announcements from the National Weather Service or regional meteorological bodies in the weeks preceding mid-August will shape market repricing.

Methodology

We track Highest temperature in Shenzhen on August 16? 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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%.