Highest temperature in Shenzhen on July 21?

Platform comparison

Market context

Shenzhen is currently experiencing overcast conditions with a temperature of 84°F (approximately 29°C) and 83% humidity at Bao'an International Airport, setting the immediate atmospheric baseline for the upcoming July 21, 2026 settlement window [1]. The market’s current 0% implied probability for a specific outcome suggests the crowd anticipates the peak temperature will fall outside the narrow range defined by the contract, a stance that aligns with typical mid-summer volatility in the region where highs frequently exceed 35°C.

Historical data for late July in Shenzhen shows consistent high-temperature patterns, with the Bao'an station often recording peaks between 33°C and 36°C during this period, making a 0% probability for a lower range statistically unusual unless the contract specifies an exceptionally high threshold. Comparable cases from previous years indicate that sudden cloud cover or rain events can temporarily suppress temperatures, yet sustained overcast conditions like those observed today rarely prevent afternoon highs from reaching the upper 30s in Celsius, creating a potential divergence between the current zero-implied odds and standard meteorological expectations for the season.

Traders should monitor the hourly updates from Wunderground and local meteorological announcements for any forecasted typhoon activity or heavy rain systems, which are the primary catalysts capable of drastically lowering the daily maximum temperature. Recent weather schedules for Guangdong indicate a high probability of convective rainfall in late July, a dependency that could invalidate the current crowd consensus if a significant system moves through the area before the settlement deadline. The divergence between the 0% market probability and the typical historical range suggests either a mispriced contract or an expectation of an extreme cooling event that has not yet been widely publicised in mainstream forecasts.

Sources: 1

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 Best Prediction Markets UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.