Highest temperature in Shenzhen on July 19?

Platform comparison

Market context

Shenzhen will experience peak summer heat on 19 July 2026, with the settlement hinging on the single highest temperature recorded at Bao'an International Airport's weather station during that calendar day. The resolution mechanism pulls directly from Wunderground's historical data feed, which timestamps observations at regular intervals; traders evaluating this market programmatically should note that airport stations typically record at hourly increments, with daily maxima occurring in mid-to-late afternoon under typical subtropical conditions.

July temperatures in Shenzhen cluster consistently between 32–36°C, with extreme readings occasionally reaching 37–38°C during particularly intense heat events. Historical data from the past five years shows the 19th falling within the typical range rather than at seasonal extremes; the current 0% probability on higher brackets suggests the crowd expects a standard summer day rather than a record-breaking event. Comparable markets on other Shenzhen dates in July have resolved across the 33–35°C bands with regularity, providing a baseline for calibrating position sizes.

The primary variable affecting outcome is the timing and intensity of the East Asian summer monsoon system, which can suppress afternoon temperatures through cloud cover and precipitation. Traders monitoring this market should track the China Meteorological Administration's 10-day forecasts released in early July, which typically flag whether tropical systems or high-pressure ridges will dominate the region. Wunderground's own forecast model becomes increasingly reliable within 7–10 days of the settlement date, allowing late-stage position adjustments as the specific weather pattern crystallises.

Methodology

We track Highest temperature in Shenzhen on July 19? 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.

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 Kalshi Fees. 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.

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 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi Fees trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.