Highest temperature in Shenzhen on July 22?

Platform comparison

Market context

Polymarket is pricing this Shenzhen heat contract at **0% YES** today, so the market is treating a higher daytime maximum as effectively not in play on the on-chain books that settle in USDC on Polygon through conditional tokens. The resolution point is specific: the highest temperature at Shenzhen Bao’an International Airport Station on 22 July 2026, with Wunderground as the stated source, so the trade is really about the station’s peak reading rather than broader city weather.

For context, Shenzhen in July is usually hot and humid rather than cool. A typical July day is around 31°C at the high and 27°C at the low, with average relative humidity near 82%, which supports persistent warm conditions even when cloud cover or rain limits extremes.[2] Current conditions in Shenzhen are already warm and humid, with AccuWeather showing 82°F and a RealFeel of 91°F, but that alone does not determine the day’s maximum because the settlement hinges on the airport station’s official daily high.[1]

The main catalysts are the local weather pattern through the afternoon and any short-lived rain or thunderstorm activity that can cap the temperature before the 12:00 UTC settlement window closes. Traders watching this market should focus on the airport station’s hourly progression on Wunderground, because a brief sunny interval can lift the day’s high even in a generally muggy setup, while convective showers or heavy cloud can leave the result in a lower band.

Sources: 1 · 2

Methodology

This page reviews Highest temperature in Shenzhen on July 22? 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 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.