Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
44% | 56% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
44% | 56% | 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 |
|---|---|
| 29°C | 44% |
| 30°C | 30% |
| 28°C | 18% |
| 31°C | 5% |
| 32°C | 1% |
| 24°C or below | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 33°C | 0% |
| 34°C or higher | 0% |
Market context
The Hong Kong Observatory will record the highest temperature in Hong Kong on 14 July 2026, measured to one decimal place in degrees Celsius. The market currently shows 0% implied probability across all temperature ranges, suggesting no consensus has formed on where the day's peak will fall. This absence of pricing reflects the inherent difficulty in forecasting a specific weather outcome eighteen months in advance, where seasonal patterns provide only broad guidance.
Hong Kong's July temperatures are remarkably consistent year on year. Historical data from the Observatory shows daily maxima in mid-July typically cluster between 32°C and 34°C, with extreme readings above 35°C occurring in roughly one in five years. The 14th holds no particular meteorological distinction within the month—it sits in the heart of the summer monsoon season when the Southeast Asian high-pressure system dominates regional weather. Comparable July days from recent decades show the Observatory's recorded highs rarely deviate far from the 33–34°C range, making outlier temperatures (either unusually cool or exceptionally hot) relatively rare events rather than baseline expectations.
Traders should monitor the broader climate patterns emerging in early 2026, particularly the strength of any El Niño or La Niña conditions, which influence East Asian summer temperatures. The Hong Kong Observatory publishes seasonal forecasts typically three months ahead; its June 2026 outlook will offer the most actionable signal for positioning before the settlement window closes. Typhoon activity in the preceding weeks could also suppress temperatures through cloud cover and rainfall, though such systems remain unpredictable at this distance.
Methodology
We track Highest temperature in Hong Kong on July 14? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
FAQ
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
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