Highest temperature in Shenzhen on May 30?

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Market context

On 30 May 2026, the highest temperature recorded at Shenzhen Bao'an International Airport will fall into one of several defined ranges. The settlement will draw from Wunderground's historical weather database, capturing the peak temperature across all hours of that calendar day in degrees Celsius. The 0% crowd-implied probability suggests traders currently see negligible conviction in whichever temperature bracket this market has designated as the YES resolution range.

Shenzhen's late-May climate sits firmly within pre-monsoon conditions, with daily highs typically ranging between 28°C and 32°C during this period. Historical data from the airport station shows May temperatures rarely exceed 34°C, though heat waves can push readings into the mid-30s. The current zero probability reading likely reflects either an extremely narrow or unusually high temperature threshold baked into the YES range—a common pattern when markets are structured around statistical outliers rather than modal outcomes. Comparable May weather markets for southern Chinese cities have shown crowd estimates clustering around 30–32°C as the most probable peak.

Traders monitoring this contract should track the Asian-Pacific weather outlook for late May 2026, particularly any developing ridge of high pressure or tropical systems that might elevate temperatures above seasonal norms. The China Meteorological Administration typically issues extended forecasts four to six weeks ahead; any official alerts regarding heat stress or anomalous warmth in the Guangdong region would shift positioning. Humidity levels and overnight lows will also influence daytime maxima, though these secondary factors rarely override the primary driver of seasonal atmospheric patterns in this region.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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?

On Best Prediction Markets, 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?

Best Prediction Markets 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.

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 does it cost to trade on Best Prediction Markets?

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

Do I need to KYC for this market?

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