Highest temperature in Qingdao on July 9?

Platform comparison

Market context

The real-world event at the heart of this market is the highest temperature recorded on 9 July 2026 at Qingdao Jiaodong International Airport, measured in degrees Celsius. In prediction markets, a YES share means you believe the outcome will fall within the specified range (here, a high temperature), while a NO share means you expect it to fall outside. Currently, the crowd implies a 0% chance of a YES outcome, suggesting most traders expect the temperature to stay below the threshold being bet on.

Historically, Qingdao’s July highs are moderated by Yellow Sea breezes, with long-term averages clustering between 27–29°C, though mean daily maxima often sit closer to 25–26°C[1][3]. Recent data shows summer temperatures in Qingdao now hover around 25–30°C, with July highs typically reaching 29°C[6][8]. However, China recorded its hottest July on record in recent years, with the highest average temperature since 1961, hinting at a warming trend that could push 2026 temperatures higher than usual[5].

Traders should monitor official weather bulletins from the China Meteorological Administration and real-time updates from Wunderground, the designated resolution source[7]. Any sudden shifts in regional wind patterns, humidity levels, or cloud cover could act as catalysts for temperature spikes. While no specific announcement is scheduled, the broader context of rising summer temperatures across eastern China remains a critical dependency for this market’s outcome[5].

Sources: 1 · 2 · 3 · 4 · 5

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

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

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 does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market 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.