Highest temperature in Shenzhen on August 20?

Platform comparison

Market context

On 20 August 2026, the highest temperature recorded at Shenzhen Bao'an International Airport Station will determine the settlement outcome for this market. The resolution will draw exclusively from the Daily Observations table on Weather Underground rather than summary high-low figures, a distinction that occasionally produces materially different readings depending on measurement timing and station protocols. Settlement occurs at 12:00 UTC on that date, locking in whichever temperature range captures the peak reading from the airport station's instruments.

Shenzhen's August climate presents a narrow historical band for extreme heat. Daily maxima in mid-August typically cluster between 32–35°C, with readings above 36°C occurring in roughly 15–20% of years during this window. The 0% crowd probability currently assigned suggests traders are pricing in either confidence that August 2026 will track below historical norms or substantial uncertainty about range definitions. Comparable markets on Kalshi's weather contracts have shown prediction-market implied probabilities diverging from seasonal climatology by 3–5 percentage points when traders perceive anomalous atmospheric conditions; sportsbook equivalents rarely exist for this category, leaving cross-platform comparison limited to academic climate models and meteorological forecasts.

Traders should monitor tropical cyclone activity in the western Pacific during late July and early August 2026, as systems tracking toward southern China can suppress daytime temperatures through cloud cover and precipitation. The China Meteorological Administration's monthly outlooks, typically released on the 10th of each preceding month, will provide official seasonal guidance. Any significant heat dome formation across East Asia in the fortnight before 20 August would shift probability materially upward.

Methodology

This page reviews Highest temperature in Shenzhen on August 20? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

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.

FAQ

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 PolyGram. 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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.