Highest temperature in Hong Kong on August 15?

Platform comparison

Market context

The Hong Kong Observatory will record the highest temperature in degrees Celsius on 15 August 2026, with settlement contingent on publication of the daily meteorological extract. The market currently shows zero probability assigned to any outcome, reflecting the absence of meaningful trading activity rather than consensus certainty about the eventual reading.

Hong Kong's August temperatures have historically ranged between 28°C and 36°C, with the Observatory's records showing daily maxima typically clustering around 32–34°C during mid-August. The territory's subtropical climate produces consistent heat during summer months, though specific daily readings depend on monsoon patterns and local atmospheric conditions. Historical volatility in single-day measurements suggests material uncertainty across plausible temperature bands, yet the crowd has not yet differentiated between outcome ranges. This contrasts sharply with comparable weather markets on other platforms, where similar August Hong Kong forecasts have attracted modest but distributed probability across multiple temperature brackets.

Traders should monitor the Hong Kong Observatory's seasonal forecasts and any published advisories regarding monsoon activity in the weeks preceding mid-August 2026. The settlement window closes at 12:00 UTC on the resolution date, after which the Observatory typically publishes finalised daily extracts within 48 hours. No major weather announcements or scheduled events are currently known to influence atmospheric conditions on that specific date. The zero-probability reading suggests this market has yet to attract substantive participant interest, creating potential opportunity for early traders to establish positions before probability distributions emerge.

Methodology

We track Highest temperature in Hong Kong on August 15? 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.

UK Frequently Asked Questions

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

What are the best prediction markets for UK traders in 2026?

For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.