Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Election Predictions UK) Pick polygram.ink (preferred broker) |
42% | 58% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
42% | 58% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 26°C | 42% |
| 27°C | 40% |
| 28°C | 17% |
| 29°C | 6% |
| 23°C or below | 0% |
| 24°C | 0% |
| 25°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C or higher | 0% |
Market context
Beijing's highest temperature on 16 August 2026 will be measured at Capital International Airport Station using Weather Underground's Daily Observations table, with resolution based on the most granular recorded data rather than summary figures. The market currently shows 0% probability across all temperature ranges, suggesting either insufficient trader participation or expectation that extreme heat thresholds are unlikely during mid-August in Beijing.
Historical August temperatures at Beijing Capital International Airport typically peak between 32–35°C, with occasional excursions above 36°C during heat waves. Data from the China Meteorological Administration shows that temperatures exceeding 38°C in mid-August occur roughly once per decade at this location. The 0% crowd probability across all ranges appears miscalibrated against seasonal norms, as at least one temperature bracket should reflect typical late-summer conditions. August 2023 saw Beijing reach 34.8°C on the 16th, whilst August 2022 peaked at 33.1°C on that date, establishing a recent baseline for comparison.
Traders should monitor China's summer weather patterns and any significant atmospheric systems developing in late July 2026. The East Asian monsoon and potential tropical cyclone activity in the Western Pacific represent key variables affecting Beijing's mid-August conditions. Weather Underground's data feed reliability and any station maintenance or recalibration during the resolution window warrant attention, given the explicit reliance on the Daily Observations table rather than summary metrics. Regional heat dome formation or unusual circulation patterns would be the primary catalysts shifting probabilities materially from current levels.
Methodology
This page tracks Highest temperature in Beijing on August 16? 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 Election Predictions UK provide a 0%-fee route into the same order book.
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
- 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 Election Predictions UK route into the same order book at 0% fees.
- 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.
- Why do Polymarket and Kalshi differ on elections?
- Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.
- 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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