Lowest temperature in Hong Kong on August 8?

Platform comparison

Market context

Hong Kong’s lowest temperature on 8 August 2026 will be set by the Hong Kong Observatory’s final “Absolute Daily Min” reading, published in its daily extract once the day is complete. The current crowd-implied probability of **0% YES** indicates the market is pricing in an outcome that, in practice, needs the final official data to confirm; there is no published settlement value yet, so the contract remains open until the Observatory finalises the day’s figures.[7][18]

Seasonally, the benchmark is a warm one: Hong Kong’s August climatology shows a mean minimum of about **26.9°C** for 8 August, with broader August norms typically around **27°C** overnight and **31°C** by day.[1][15] Recent public hourly readings also show the city starting the day in the high-20s Celsius, with the Observatory at **29°C at 3 a.m.** and several districts between **27°C and 30°C**.[13] That backdrop matters because a low-temperature contract is usually driven by whether the pre-dawn hours hold onto tropical-night levels or dip slightly lower than usual; the historical August record low cited by third-party weather services is still far above temperate-market territory at roughly **19.2°C**, underscoring how uncommon a truly cool August morning would be.[3][6]

For cross-platform comparison, the main divergence to watch is between the prediction market’s current **0% YES** and any sportsbook or analyst framing that may still treat a sub-climatological reading as a live tail risk. The decisive catalyst is not a forecast model headline but the Observatory’s publication schedule: the settlement source is the official daily extract, and the market cannot resolve until that data is posted.[7][18] If the overnight hourly readings stay clustered near the current mid-to-high-20s Celsius pattern, the eventual result is likely to track normal August Hong Kong weather rather than a sharp deviation.[13][1]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Lowest temperature in Hong Kong on August 8? 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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Best Prediction Markets UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.