Highest temperature in Shenzhen on May 25?

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Market context

Shenzhen's late May weather typically sits in the warm-to-hot range as the city transitions toward summer monsoon season. The 0% crowd probability on this market suggests traders are either uncertain about the specific temperature bands available or treating this as a calibration exercise on a straightforward meteorological outcome. May 25th falls within Shenzhen's pre-typhoon season window, when daytime highs commonly reach 28–32°C, though conditions remain largely predictable absent tropical systems.

Historical May data from Bao'an Airport shows consistent patterns: the station records daily maxima between 26–34°C during this period, with 30°C as a reasonable central estimate. Comparable years reveal little volatility in late-May temperatures unless an early-season storm system approaches the Pearl River Delta region. The current zero probability likely reflects that traders have not yet engaged with the specific temperature brackets offered, rather than any expectation of anomalous conditions.

The key variable to monitor is tropical cyclone activity in the Western Pacific. The China Meteorological Administration and regional forecasting services typically issue 10-day outlooks by mid-May that would flag any unusual systems. Standard seasonal patterns suggest stable high-pressure conditions through late May, with the Southwest Monsoon not yet fully established. Settlement depends on Wunderground's historical records from Bao'an, which maintains consistent measurement protocols, making this a straightforward data-dependent resolution once the date passes.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, 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

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.