Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
99% | 1% | 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 |
|---|---|
| 28°C | 99% |
| 29°C | 1% |
| 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% |
| 30°C or higher | 0% |
Market context
Chongqing is entering its peak summer heat phase on 2 July 2026, with the city’s Jiangbei International Airport Station expected to record daytime highs well above 30°C. Historical data confirms that early July in Chongqing typically sees temperatures between 32°C and 37°C, occasionally reaching 40°C, especially during heatwaves. The current crowd-implied probability of 0% for a specific temperature range suggests traders are either misreading the baseline or betting on an unusually cool outlier, which contradicts decades of weather records.
Past July 1 and July 2 readings show the city clearing 30°C in the overwhelming majority of years, with some days hitting 43°C during extreme heat events. This pattern frames the current 0% probability as highly improbable unless a major, unforecasted cooling event occurs. Traders should monitor official weather bulletins from China’s National Meteorological Centre and real-time updates from Wunderground, the designated resolution source. Recent news from China Daily highlights that July 2025 was China’s hottest month on record, reinforcing the likelihood of elevated temperatures in 2026. The market appears to be leaning on the absence of a declared heat emergency as a false signal, rather than the actual meteorological trend. Watch for any scheduled climate declarations or campaign-finance disclosures related to regional infrastructure projects that could influence public perception of heat risks.
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 July 2? 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.
FAQ
- 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.
- Can prediction markets influence election outcomes?
- Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.
- Which platform has the deepest political liquidity?
- Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.
- 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.
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