Highest temperature in Shenzhen on July 27?

Platform comparison

Market context

Polymarket is pricing this Shenzhen airport temperature contract at **0% YES**, which means the market is implying effectively no chance of the day’s high landing in the specified winning range. On the ground, the real-world event is simple: it will settle against the **highest temperature recorded at Shenzhen Bao’an International Airport Station** in Celsius, using the Wunderground daily history page for 27 July 2026. Because the settlement is tied to a single station reading rather than a citywide average, traders on Polygon are really positioning around the likelihood of that one airport observation, with USDC-backed conditional tokens marking the outcome.

For context, Shenzhen is a hot, humid July city, and the historical pattern already points to highs around the low 30s Celsius rather than extreme outliers. July averages are commonly cited at about **32°C** for daytime highs, with **26°C** nights, and July is also one of the wettest months, with frequent rain and heavy rainfall totals. Current hourly conditions are already warm and muggy, with AccuWeather showing **82°F** and a **34%** chance of precipitation, which is consistent with a climate where cloud cover and showers can cap the day’s maximum even when humidity remains high.

A trader watching this market should focus on the intraday forecast path for Shenzhen and any sign of convective rain or thunderstorm development during the local daytime heating window, because those are the main factors that determine whether the airport station prints a lower or higher maximum. As the settlement deadline is fixed in UTC, the key practical dependency is the local afternoon weather in Shenzhen rather than any broader macro event; in contract terms, the final print from Wunderground matters more than headline city forecasts, since conditional-token settlement follows the source reading rather than a consensus estimate.

Sources: 1 · 2 · 3 · 4

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

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'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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.