Highest temperature in Shenzhen on July 28?

Platform comparison

Market context

Shenzhen's peak temperature on 28 July 2026 will be recorded at Bao'an International Airport Station and resolved against historical weather data from Wunderground. July is consistently the hottest month in Shenzhen, with daily highs typically ranging between 32–35°C, though extremes occasionally exceed 36°C. The 0% crowd-implied probability suggests traders are either uncertain about the specific temperature bands offered or expect the settlement window to close before reliable forecasts emerge.

Historical July records for Shenzhen show considerable year-to-year variation. The city experienced a peak of 37.6°C in July 2019 and regularly records days above 35°C during the monsoon season. Comparable Asian coastal cities at similar latitudes—Hong Kong, for instance—show July highs clustering around 32–34°C in typical years, with heat waves pushing into the upper 30s. The current zero probability likely reflects the market's early stage relative to the settlement date, as meaningful weather forecasts typically solidify only 10–14 days before the target date.

Traders should monitor tropical cyclone activity in the South China Sea during late July, which can suppress temperatures through cloud cover and precipitation, or conversely intensify heat through atmospheric pressure changes. The China Meteorological Administration issues monthly outlooks in early July that often flag temperature anomalies for the Pearl River Delta region. Urban heat island effects at Bao'an—a densely developed airport zone—may push recorded highs 1–2°C above surrounding areas. No major scheduled events or policy announcements typically influence Shenzhen's July weather patterns, making this a relatively pure weather-dependent contract.

Methodology

We track Highest temperature in Shenzhen on July 28? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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 PolyGram 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.