Highest temperature in Shenzhen on July 19?

Platform comparison

Market context

On 19 July 2026, the highest temperature recorded at Shenzhen Bao'an International Airport will determine the settlement range for this market. Shenzhen sits in southern Guangdong Province, experiencing a subtropical climate with pronounced summer heat. July is the region's peak summer month, with typical daily highs ranging from 32–35°C, though readings above 36°C occur regularly during heat waves. The settlement window closes at midday UTC on the resolution date, meaning only temperatures recorded up to that point count toward the final outcome.

Historical data from Shenzhen's summer months shows considerable year-to-year variation. Between 2015 and 2024, July highs at Bao'an Airport ranged from 33°C to 38°C, with extremes tied to monsoon patterns and high-pressure systems moving across southern China. The current 0% implied probability suggests the market may be pricing in an unusually cool outcome or reflecting sparse early trading. Given Shenzhen's reliable summer heat and the airport station's consistent recording practices, the consensus appears heavily weighted toward mid-range temperatures (33–36°C), leaving potential value in higher-temperature brackets if atmospheric conditions favour heat accumulation.

Traders should monitor seasonal weather forecasts released in early July 2026 and track any anomalous pressure systems or typhoon activity that could suppress temperatures. The East Asian summer monsoon's strength in mid-July typically influences whether heat builds or dissipates across the Pearl River Delta region. Wunderground's historical archive provides reliable settlement data, though traders should verify the specific station designation (ZGSZ) matches the airport's official weather reporting location.

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

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 Who Will Win 2026. 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 reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.