Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
40% | 60% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
40% | 60% | 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 | 40% |
| 29°C | 28% |
| 27°C | 23% |
| 30°C | 8% |
| 31°C | 2% |
| 25°C or below | 0% |
| 26°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C or higher | 0% |
Market context
Hong Kong faces its peak summer heat today as the city monitors whether July 16, 2026, will break previous temperature records. The Hong Kong Observatory is the sole authority for recording the day’s absolute maximum temperature, which will determine the market’s resolution into specific Celsius ranges. With the crowd-implied probability at 0% for the current YES outcome, traders are effectively betting that the temperature will not fall within the specific range offered, suggesting expectations of either a cooler day or a range mismatch.
Historical data shows Hong Kong regularly experiences highs between 31°C and 34°C in mid-July, with extreme days occasionally reaching 35°C or higher under strong subtropical ridges. For instance, July 2022 saw temperatures hit 34.6°C, while the all-time monthly record for July stands at 36.1°C recorded in 1963. The current 0% probability implies the market expects the temperature to fall outside the defined bracket, possibly due to incoming cloud cover or rain, which aligns with today’s scattered cloud conditions reported at Hong Kong International Airport [1].
Traders should watch real-time updates from the Hong Kong Observatory’s Daily Extract, which publishes the finalized “Absolute Daily Max” once data is confirmed. No political debates, campaign disclosures, or scheduled conventions influence this weather event, as the market is purely meteorological. The primary catalyst remains the observatory’s official release, expected shortly after the settlement window closes at 12:00 UTC on 16 July 2026. Until that publication, the 0% probability reflects uncertainty about the exact range rather than a definitive forecast of cooler conditions.
Sources: 1
Methodology
This page tracks Highest temperature in Hong Kong on July 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 Trump Prediction 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.
FAQ
- 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.
- 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.
- 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.
- Which political events have the biggest volume?
- US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.
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