Highest temperature in Shenzhen on July 22?

Platform comparison

Market context

Polymarket is pricing this Shenzhen airport temperature contract at **0% YES** right now, so the market is effectively saying the stated Celsius range is not yet seen as a live outcome in USDC terms on Polygon’s conditional-tokens rails. For a user holding or considering the position, the key point is that settlement depends on the **highest temperature at Shenzhen Bao'an International Airport Station** recorded on Wunderground for 22 July, not on city-wide headlines or a nearby district reading.

Seasonally, Shenzhen in July is normally hot and humid rather than cool, which makes the current zero bid look more like a pricing artefact than a strong meteorological judgement. Typical July highs are around **31°C** with lows near **27°C**, and humidity is high; that profile leaves plenty of room for afternoon peaks above the low-30s even before considering local airport conditions such as sunshine, sea breeze and cloud cover.[2] Current conditions in Shenzhen are already warm, with AccuWeather showing **82°F** and a RealFeel of **91°F**, which fits the broader summer pattern rather than an outlier cool spell.[1]

The live catalysts are weather-linked rather than event-driven: traders should watch the day’s hourly forecast, any rain bands or thunderstorm risk, and whether the airport station’s observed maximum is delayed into the afternoon or early evening before the settlement window closes. Because the market resolves on the Wunderground airport record, the relevant dependency is the station’s reported daily high, so late-day heat, cloud breaks or convective showers can matter more than the morning reading and can shift the final range even if the city feels broadly similar across Shenzhen.[1][2]

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 Kalshi UK, 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 Kalshi 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.