Highest temperature in Qingdao on July 7?

Platform comparison

Market context

The underlying real-world event hinges on the highest temperature recorded at Qingdao Jiaodong International Airport on 7 July 2026, with current Polymarket pricing showing the "YES" outcome for 30°C or higher at 0% probability. Instead of the abstract weather, the on-chain contract trades conditional tokens on Polygon using USDC, where the leading outcome is currently "26°C" at 22% probability, reflecting a market consensus that extreme heat is unlikely today [3].

Historical climatology for Qingdao in July typically sees average highs around 29°C, with daily ranges often spanning 23°C to 29°C, making a 30°C spike statistically rare but not impossible [1][6]. While July 2002 recorded a record 39°C, recent forecasts for July 2026 suggest daily highs between 25°C and 32°C, aligning with the market’s low confidence in a 30°C+ threshold [4][8]. The 0% probability implies traders view the current atmospheric conditions as insufficient to breach this threshold, despite the warm season extending from June to September [5].

Traders should monitor the daily weather updates from AccuWeather and Wunderground, specifically the hourly temperature logs for Qingdao Jiaodong Airport, as these will determine the settlement outcome [4]. Any sudden announcements regarding heatwaves or monsoon delays from the Shandong Meteorological Bureau could shift probabilities, though no such alerts are currently active. The settlement window closes at 12:00 UTC on 7 July 2026, meaning real-time data from Wunderground will be the definitive source for resolution [2].

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

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

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.

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.

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.