Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
71% | 29% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
71% | 29% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 34°C | 71% |
| 35°C | 23% |
| 36°C | 9% |
| 38°C or higher | 1% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 37°C | 0% |
Market context
Chongqing’s heat is the real-world event behind this market: the question is whether the city’s airport station prints a daytime maximum in the low-to-mid 30s Celsius, or whether a stronger heat spike pushes it higher. Crowd pricing is already treating a very hot outcome as the base case, with the leading bands clustered around 34–35°C on Polymarket, which fits the broader seasonal pattern that August is Chongqing’s hottest month and regularly produces highs around 34°C or above.[1][2][5]
That makes the current 0% implied probability look more like a stale or distorted market signal than a forecast of genuinely cool weather. Comparable climate references put Chongqing’s August averages in the mid-30s Celsius for highs, while guide sites note that extreme heat waves can lift maxima into the upper 30s or even low 40s.[7][9][13][17] In other words, the relevant frame is not whether it gets hot, but whether today’s observed maximum stays near the market’s centre of gravity or breaks upwards into the highest brackets.
For traders, the key catalyst is the live station observation rather than a headline forecast: the resolution depends on the highest temperature in Weather Underground’s Daily Observations table for Chongqing Jiangbei International Airport, not the Day High & Low summary, and revisions remain possible until the first datapoint for the following date is published.[1] The market is therefore leaning most heavily on intraday heating, thunderstorm timing, and whether cloud cover or shower activity limits the peak; AccuWeather’s forecast for a hot, storm-affected day reinforces that the main swing factor is how much solar heating is allowed before convection builds.[12][14]
Methodology
Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Chongqing on August 10? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.
Resolution & payout
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
UK Frequently Asked Questions
- How accurate are political prediction markets?
- Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.
- What resolution source is used for elections?
- Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.
- How fast do political markets react to news?
- High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.
- Are political prediction markets legal in my country?
- It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.
- Are UK election prediction markets available from the UK?
- Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.
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