Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Best Prediction Markets UK) Pick polygram.ink (preferred broker) |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | View on Polymarket → |
Polymarket (direct) polymarket.com |
99% | 1% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | View on Polymarket → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | View on Polymarket → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | View on Polymarket → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | View on Polymarket → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 28°C | 99% |
| 20°C or below | 0% |
| 21°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 22°C | 0% |
| 23°C | 0% |
| 24°C | 0% |
| 25°C | 0% |
| 29°C | 0% |
| 30°C or higher | 0% |
Market context
Chongqing on 2 July 2026 will experience its peak summer heat, with the highest temperature recorded at Jiangbei International Airport determining the outcome of this prediction contract. The market currently implies a 0% chance of the temperature falling within the specified range, a figure that starkly diverges from historical climate data and analyst consensus on Chongqing’s July extremes.
Historical records confirm July is Chongqing’s hottest month, with average highs near 33°C and peaks reaching 44°C in recent summers[1][2]. Climate models for July 2026 forecast daily highs between 32°C and 37°C, with overnight lows of 25–30°C, making a 0% probability for the specified range highly questionable[7]. Comparable cases from July 1 show similar market mispricing, where implied odds of 41% for hitting 30°C were deemed too low against climate records[8].
Traders should monitor real-time weather updates from Wunderground and local meteorological announcements, as Chongqing frequently experiences sudden heat spikes or rain-induced cooling in July[9]. The settlement relies exclusively on the highest temperature recorded at any time on 2 July, so even brief periods of extreme heat could alter the outcome. Recent travel guides note continuous high temperatures and frequent rainfall, creating volatile conditions that demand close observation of hourly data[9]. No sportsbook lines currently cover this event, leaving prediction markets as the primary venue for odds comparison.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets UK, which mirrors the Polymarket order book directly.
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.
- 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.
Trade Highest temperature in Chongqing on July 2? on Best Prediction Markets UK
Live order book, 0% fees, USDC settlement in seconds.
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