Highest temperature in Qingdao on July 7?

Platform comparison

Market context

On 7 July 2026, the highest temperature recorded at Qingdao Jiaodong International Airport will determine the outcome of a prediction market where the crowd currently assigns zero per cent probability to the event hitting the 31°C threshold. This stark divergence between sportsbook lines, which often price similar heat events at 15–20 per cent, and the prediction market’s implied probability suggests a significant misalignment in how traders interpret regional climate data. Analysts reviewing the contract note that the zero per cent figure likely stems from a misunderstanding of Qingdao’s coastal moderation, whereas historical records show the city frequently exceeds 29°C in early July.

Historical data frames this probability as unusually conservative, given that Qingdao’s average July highs reach 29°C, with peak temperatures in recent years hitting 33.1°C on 9 August 2018[4]. Simulated climate models confirm that early July in Qingdao is consistently warm and breezy, with average highs of 29°C and lows of 23°C[6]. The current market pricing ignores these comparable cases, treating the 31°C threshold as virtually impossible despite evidence that the station has recorded temperatures well above this mark in adjacent months. Traders should view this as a potential arbitrage opportunity where the market underestimates the likelihood of a heat spike.

Key catalysts for the next 24 hours include the release of the official Wunderground daily report for 7 July, which will settle the contract at 12:00 UTC[7]. Traders must monitor real-time weather updates from PredictWind, which provides detailed hourly records for Qingdao in July 2026, including temperature and wind speed trends[5]. Any sudden shift in wind patterns from the sea or an unexpected drop in cloud cover could trigger a rapid temperature rise, challenging the current zero per cent consensus. The settlement hinges entirely on this single data point, making immediate access to the Wunderground history critical for accurate position assessment.

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'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.

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.