Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
92% | 8% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
92% | 8% | 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 |
|---|---|
| 37°C | 92% |
| 38°C | 8% |
| 30°C or below | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 39°C | 0% |
| 40°C or higher | 0% |
Market context
Guangzhou’s heat on 10 August is usually governed by the city’s late-summer monsoon pattern: August averages are around 32–33°C by day, with frequent rain and high humidity, so the more relevant question is whether afternoon heating outpaces cloud cover and showers. Recent forecast pages for Guangzhou point to a hot day, with AccuWeather showing a high near 100°F and hourly temperatures pushing up through the afternoon, while Weather Underground’s current history page for the city shows a very warm start to the morning and an active day ahead.[2][12][14]
That context matters because the market is not asking about the headline forecast high, but the highest reading that ends up appearing in Weather Underground’s Daily Observations table at Guangzhou Baiyun International Airport Station. Comparable August records from travel and climatology sources cluster in the low 30s Celsius, with typical highs around 33°C and occasional peaks into the mid-30s, so a reading in the 33–36°C band would fit the historical pattern better than an extreme outlier.[7][8][11][17] In practical terms, a 0% yes probability leaves the market leaning almost entirely on whether the day reaches the upper end of the usual August envelope rather than on any rare record heat.[2][8]
For traders, the main catalyst is the day’s actual observation sequence: the first strong afternoon surge, any sea-breeze or thunderstorm interruption, and whether late-day sunshine allows the station to tack on a final increment before the close of the settlement window. The more exposed the city stays to clearing skies and sustained solar heating, the more likely the Daily Observations table will print a temperature above the low-30s Celsius benchmark; if cloud build and rain dominate, the cap is usually lower. Current weather pages suggest heat is already established, so the market is leaning most heavily on the intraday forecast path rather than on longer-run monthly averages.[12][14][18]
Methodology
This page tracks Highest temperature in Guangzhou on August 10? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.
Resolution & payout
Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.
Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.
UK Frequently Asked Questions
- 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.
- 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.
Trade Highest temperature in Guangzhou on August 10? on Trump Prediction
Live order book, 0% fees, USDC settlement in seconds.
Open live market →