Highest temperature in Shenzhen on July 28?

Platform comparison

Market context

Shenzhen will experience peak summer heat on 28 July 2026, with the highest temperature recorded at Bao'an International Airport Station determining settlement. The market currently shows 0% implied probability across all temperature bands, reflecting either a data lag or settlement mechanics requiring explicit price discovery. On Polygon, traders would deploy USDC to purchase conditional tokens representing specific temperature ranges, with payouts determined by Wunderground's historical weather data for that calendar date.

Shenzhen's July temperatures have consistently exceeded 33°C over the past decade, with peak daily highs regularly reaching 34–36°C during the height of summer. The 2023 and 2024 July records at Bao'an show maximum temperatures between 34.5°C and 35.8°C, establishing a baseline for interpreting current market pricing. Historical volatility around tropical weather systems occasionally pushes readings toward 37°C, though sustained heat above 36°C remains less frequent than moderate highs in the 34–35°C band.

Traders should monitor the China Meteorological Administration's forecasts and any tropical cyclone activity in the South China Sea during late July, as these systems can either suppress temperatures through cloud cover or intensify heat through atmospheric pressure dynamics. The settlement window closes at 12:00 UTC on 28 July, giving traders access to real-time weather data through the morning of that day. Wunderground's historical records for Bao'an typically update within hours of observation, reducing ambiguity around final settlement values.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Alternative UK, which mirrors the Polymarket order book directly.

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 Polymarket Alternative 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.

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.